EP2594605B1 - A thermoplastic composition, method of producing the same, and articles made therefrom - Google Patents
A thermoplastic composition, method of producing the same, and articles made therefrom Download PDFInfo
- Publication number
- EP2594605B1 EP2594605B1 EP13153683.1A EP13153683A EP2594605B1 EP 2594605 B1 EP2594605 B1 EP 2594605B1 EP 13153683 A EP13153683 A EP 13153683A EP 2594605 B1 EP2594605 B1 EP 2594605B1
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- European Patent Office
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- component
- thermoplastic composition
- meth
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- 239000000203 mixture Substances 0.000 title claims description 112
- 229920001169 thermoplastic Polymers 0.000 title claims description 103
- 239000004416 thermosoftening plastic Substances 0.000 title claims description 87
- 238000000034 method Methods 0.000 title claims description 45
- 229920000642 polymer Polymers 0.000 claims description 76
- 239000000178 monomer Substances 0.000 claims description 73
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 53
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 42
- 239000000654 additive Substances 0.000 claims description 42
- 238000004132 cross linking Methods 0.000 claims description 36
- 229920001577 copolymer Polymers 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 25
- 230000001603 reducing effect Effects 0.000 claims description 25
- 230000009477 glass transition Effects 0.000 claims description 20
- 230000000996 additive effect Effects 0.000 claims description 17
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000000155 melt Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 11
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical group CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 9
- 238000000071 blow moulding Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000001175 rotational moulding Methods 0.000 claims description 5
- 238000003856 thermoforming Methods 0.000 claims description 5
- 238000003490 calendering Methods 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000000113 differential scanning calorimetry Methods 0.000 claims description 2
- 238000010526 radical polymerization reaction Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 68
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 52
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 52
- 239000000243 solution Substances 0.000 description 28
- 239000004800 polyvinyl chloride Substances 0.000 description 20
- 229920000915 polyvinyl chloride Polymers 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 229920003023 plastic Polymers 0.000 description 16
- 239000004033 plastic Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 14
- 230000009467 reduction Effects 0.000 description 14
- 239000004971 Cross linker Substances 0.000 description 13
- 239000011521 glass Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 239000004816 latex Substances 0.000 description 12
- 229920000126 latex Polymers 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 11
- -1 poly(ethylene terephthalate) Polymers 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- FDENMIUNZYEPDD-UHFFFAOYSA-L disodium [2-[4-(10-methylundecyl)-2-sulfonatooxyphenoxy]phenyl] sulfate Chemical compound [Na+].[Na+].CC(C)CCCCCCCCCc1ccc(Oc2ccccc2OS([O-])(=O)=O)c(OS([O-])(=O)=O)c1 FDENMIUNZYEPDD-UHFFFAOYSA-L 0.000 description 10
- 238000009472 formulation Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 9
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 9
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 9
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- 239000004926 polymethyl methacrylate Substances 0.000 description 8
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 8
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 7
- 239000004594 Masterbatch (MB) Substances 0.000 description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 6
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 229920006249 styrenic copolymer Polymers 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 4
- 239000004801 Chlorinated PVC Substances 0.000 description 4
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- 229920000457 chlorinated polyvinyl chloride Polymers 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229920000747 poly(lactic acid) Polymers 0.000 description 4
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000004626 polylactic acid Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229920000638 styrene acrylonitrile Polymers 0.000 description 4
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 4
- 125000006702 (C1-C18) alkyl group Chemical group 0.000 description 3
- 241001093575 Alma Species 0.000 description 3
- 239000006057 Non-nutritive feed additive Substances 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 229920006243 acrylic copolymer Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- NJVOHKFLBKQLIZ-UHFFFAOYSA-N (2-ethenylphenyl) prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1C=C NJVOHKFLBKQLIZ-UHFFFAOYSA-N 0.000 description 2
- XOJWAAUYNWGQAU-UHFFFAOYSA-N 4-(2-methylprop-2-enoyloxy)butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCOC(=O)C(C)=C XOJWAAUYNWGQAU-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004641 Diallyl-phthalate Substances 0.000 description 2
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 229920005372 Plexiglas® Polymers 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 2
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007771 core particle Substances 0.000 description 2
- 239000011258 core-shell material Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000013020 final formulation Substances 0.000 description 2
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 2
- 238000010102 injection blow moulding Methods 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 2
- 229920000193 polymethacrylate Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000010420 shell particle Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 2
- 125000004209 (C1-C8) alkyl group Chemical group 0.000 description 1
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- ZIGPVIDIXFIROW-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(C)COC(=O)C(C)=C ZIGPVIDIXFIROW-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- JTHZUSWLNCPZLX-UHFFFAOYSA-N 6-fluoro-3-methyl-2h-indazole Chemical compound FC1=CC=C2C(C)=NNC2=C1 JTHZUSWLNCPZLX-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920005440 Altuglas® Polymers 0.000 description 1
- 239000004609 Impact Modifier Substances 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 1
- 239000012963 UV stabilizer Substances 0.000 description 1
- 125000005399 allylmethacrylate group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- GCTPMLUUWLLESL-UHFFFAOYSA-N benzyl prop-2-enoate Chemical compound C=CC(=O)OCC1=CC=CC=C1 GCTPMLUUWLLESL-UHFFFAOYSA-N 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011929 di(propylene glycol) methyl ether Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000002296 dynamic light scattering Methods 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000010103 injection stretch blow moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- KCAMXZBMXVIIQN-UHFFFAOYSA-N octan-3-yl 2-methylprop-2-enoate Chemical compound CCCCCC(CC)OC(=O)C(C)=C KCAMXZBMXVIIQN-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000847 optical profilometry Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004597 plastic additive Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/14—Copolymers of styrene with unsaturated esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/066—Copolymers with monomers not covered by C08L33/06 containing -OH groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/18—Homopolymers or copolymers of nitriles
- C08L33/20—Homopolymers or copolymers of acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/53—Core-shell polymer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
Definitions
- the instant invention relates to a thermoplastic composition, a method for forming articles therefrom, and articles made therefrom.
- thermoplastic materials require a low gloss surface, including for example, thermoplastic panels with a wood-like appearance.
- Current approaches used to lower plastic surface gloss include the use of 5 to 15 wt% of 1 to 10 micron sized inorganic fillers and/or crosslinked polymeric particles plastic additives based on the total weight of the plastic formulation (i.e., base plastic or polymer plus all additives).
- Such inorganic and polymeric particles generally lower surface gloss by extending from the plastic surface providing a rough surface which destructively scatters light thereby decreasing gloss.
- Such additives tend to significantly reduce the impact resistance of the plastic to which they are added.
- such additives generally make the final plastic formulation opaque.
- a plastic formulation with low surface gloss, good impact resistance, good burnish resistance and which may be heat treated post initial processing without a substantial increase in gloss would be very desirable.
- the gloss reduction additive is compatible with the thermoplastic polymer matrix so as to provide a uniform sheet in melt processing, and specifically which is compatible with polymethyl methacrylate (“PMMA”), acrylonitrile butadiene styrene polymer (“ABS”), poly(styrene-co-acrylonitrile) (“SAN”), polyvinylchloride (“PVC”), acrylonitrile/styrene acrylate (“ASA”), chlorinated polyvinylchloride (“CPVC”), polylactic acid (“PLA”), polycarbonate (“PC”), polyesters, such as poly(ethylene terephthalate) (“PET”), poly(butylene terephthalate) (“PBT”), and polyethylene terephthalate glycol (“PETG”).
- PMMA polymethyl methacrylate
- ABS acrylonitrile butadiene
- EP0621291 is recognised as the closest prior-art of the current invention and discloses processes for preparing polymeric gloss modifiers capable of reducing the surface gloss of a thermoplastic resin such as polyvinyl chloride, said gloss modifiers being based on core-shell (meth)acrylic copolymers crosslinked with 0.5 wt % of crosslinking monomer.
- EP1061100 discloses PVC compositions incorporating a gloss-reducing composition based on the combination of core-shell acrylic copolymers having a crosslinked core comprising C1-C8 alkyl acrylate monomers and 0.1 to 5 parts by weight of crosslinker or graftlinker.
- the invention is a thermoplastic composition, a method for forming articles therefrom, articles made therefrom, and methods for making such articles.
- the invention relates to a thermoplastic composition
- a thermoplastic composition comprising the melt blending product of a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising a (meth)acrylate copolymer having a glass transition temperature of greater than or equal to 10°C and from 0.001 and 0.04 parts by weight per hundred parts by weight of the total weight of the one or more (meth)acrylate monomers derived from one or more crosslinking monomers and/or graft-linking agents, and one or more, optionally crosslinked, thermoplastic shells having a Tg of equal to or greater than 60°C wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers, and wherein the glass transition temperature is measured using differential scanning calorimetry at a rate of 10°C/min from room temperature up to 180°C.
- the thermoplastic composition comprises comprising the melt blending product of: a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents and one or more (meth)acrylate monomers polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally contains from 0.001 to 0.04 PHM units derived from one or more crosslinking monomers and/or graft-linking agents, wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers.
- the one or more (meth)acrylate copolymers comprise one or more monomers selected from the group consisting of C 1 -C 18 alkyl (meth)acrylate monomer units and combinations thereof, wherein the one or more styrenic copolymers comprise one or more monomers selected from styrene monomers, acrylonitrile monomers, and combinations thereof, and wherein the one or more (meth)acrylate/styrenic copolymers comprise units derived from one or more monomers selected from the group of C 1 -C 18 alkyl (meth)acrylate monomer units and combinations thereof and one or more monomers selected from styrene monomers, acrylonitrile monomers, and combinations thereof and optionally comprise from 0.001 to 0.04 PHM of units derived from one or more crosslinking monomers and/or graft-linking agents and combinations thereof.
- the second component has a polymer particle volume average size from 70 to 250 nm.
- the one or more (meth)acrylate copolymer of the one or more gloss reducing additives comprise from 50 to 95 percent by weight units derived from methylmethacrylate units and from 5 to 50 percent by weight units derived from ethylacrylate and/or butylacrylate units.
- the one or more (meth)acrylate copolymers of the second component comprise from 65 to 85 % by weight of units derived from methylmethacrylate and from 35 to 15 wt % units derived from ethylacrylate units and further wherein the gloss reducing additive comprises from 0.002 to 0.015 PHM of units derived from EDGMA.
- the inventive thermoplastic composition has an impact value that is at least 90 % of the impact value of the first component.
- the invention in another aspect, relates to a method for forming an article comprising the steps of selecting a thermoplastic composition according to Claim 1; and forming the thermoplastic composition into an article.
- the method for forming an article comprises:
- Another alternative embodiment of the invention provides an article formed from an inventive method.
- the article made from an inventive thermoplastic composition and/or according to an inventive method has a gloss which is substantially independent of the shear rate during the step of forming the thermoplastic composition into the article.
- the one or more thermoplastic polymers of the first component are selected from the group consisting PMMA, poly(styrene-co-acrylonitrile), acrylonitrile butadiene styrene polymer, polyamides, polyacrylates, thermoplastic polyesters, polyvinyl chloride, chlorinated polyvinyl chloride, polycarbonate, polylactic acid, polymethacrylate, acrylonitrile/styrene acrylate (ASA), polystyrene, blends thereof and combinations thereof.
- PMMA poly(styrene-co-acrylonitrile), acrylonitrile butadiene styrene polymer, polyamides, polyacrylates, thermoplastic polyesters, polyvinyl chloride, chlorinated polyvinyl chloride, polycarbonate, polylactic acid, polymethacrylate, acrylonitrile/styrene acrylate (ASA), polystyrene, blends thereof and combinations thereof.
- the application further discloses a test specimen produced from the thermoplastic composition that has a gloss of less than or equal to 65 at a 75 degree angle.
- the application further discloses a gloss of a test specimen produced from the thermoplastic composition that is not increased by more than 10% following thermoforming of the test specimen.
- the crosslinking and/or graft-linking monomers are selected from the group consisting of divinylbenzene, trimethylolpropane triacrylate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, allyl methacrylate, diallyl phthalate, diallylacrylamide, triallyl (iso)cyanurate, triallyl trimelitate, (poly)alkylene glycol, 1,6-hexanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, (poly)tetramethylene glycol di(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol di(meth)acrylate, dipentaerythritol hexa
- thermoplastic composition consisting essentially of the melt blending product of: a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents and one or more (meth)acrylate monomers polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally contains 0.001 and 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers.
- thermoplastic composition comprising the melt blending product of: a first component which consists essentially of one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents and one or more (meth)acrylate monomers polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally contains 0.001 - and 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers.
- the instant invention provides a thermoplastic composition, a method for forming articles therefrom, articles made therefrom and methods for making such articles.
- thermoplastic composition comprising the melt blending product of: a first component comprising one or more thermoplastic polymers; and from 2 to 20 parts by weight per 100 parts by weight of the first component (PHR), of a second component comprising one or more gloss reducing additive copolymers wherein each gloss reducing additive copolymer comprises a (meth)acrylate copolymer derived from one or more (meth)acrylate monomers and 0.001 to 0.04 PHM (parts per hundred monomer based on the total weight of the one or more (meth)acrylate monomers) derived from one or more crosslinking monomers and/or graft-linking agents; wherein each gloss reducing additive copolymer has a glass transition temperature of greater than or equal to 40 °C and wherein a test specimen produced from the thermoplastic composition (that is 2 inches wide and 40 mils thick produced by extrusion through a film die) has a roughness according to DIN 4768 of Ra greater than or equal to 0.6 microns, Rz greater
- thermoplastic composition according to the present invention comprises a first component of one or more thermoplastic polymers.
- thermoplastic polymers useful in the first component include, but are not limited to, PMMA, SAN, ASA, ABS, polyamides, polyarylates, thermoplastic polyesters (such as, PET, PETG, and PBT), polyamides, polyacrylates, polyvinyl chloride, chlorinated polyvinylchloride, polycarbonate, polylactic acid, polystyrene, polymethacrylate; blends thereof, and combinations thereof.
- the thermoplastic composition comprises from 2 to 20 PHR of the second component, based on 100 parts of the first component. All individual values and subranges from 2 to 20 PHR are included herein and disclosed herein; for example, the PHR of the second component can be from a lower limit of 2, 3, 7, 9, 11,13,15,17 or 19 PHR to an upper limit of 5, 7, 10, 12, 14, 17, or 20 PHR. For example, the PHR of the second component may be in the range of from 2 to 20 PHR, or from 3 to 9 PHR, or from 7 to 19 PHR.
- the one or more gloss reducing additives comprise from 0.001 to 0.04 PHM units derived from one or more crosslinking monomers and/or graft-linking agents.
- the term "one or more multifunctional cross-linking monomers and/or graft-linking agents” means that one or more cross-linking monomers may be present, one or more graft-linking agents may be present or that one or more crosslinking monomers in combination with one or more graft-linking agent may be present.
- crosslinking monomer and “graft-linking agent” mean monomeric units having two or more ethylenically unsaturated radicals capable of free-radical polymerization.
- an amount derived from the one or more crosslinking monomers and/or graft-linking agents may be present from a lower limit of 0.001, 0.003, 0.005, 0.006 or 0.009 PHM to an upper limit of 0.04, 0.03, 0.02, 0.01, or 0.008 PHM.
- the PHM of units derived from the one or more crosslinking monomers and/or graft-linking agents may be in the range of from 0.001 to 0.04 PHM, or from 0.003 to 0.03 PHM, or from 0.005 to 0.02 PHM.
- a crosslinking monomer useful in the gloss reducing additives is a monomer that has two or more reactive groups that are capable of participating in a polymerization reaction.
- exemplary crosslinking monomers include, but not limited to divinylbenzene, trimethyolpropane triacrylate, ethylene glycol dimethacrylate (EGDMA), butylene glycol dimethacrylate (BGDMA), trimethyolpropane trimethacrylate, allyl methacrylate, blends thereof, and combinations thereof.
- the second component may contain from 0.001 to 0.04 PHM derived from crosslinking monomer selected from the group consisting of divinylbenzene; allyl compounds including diallyl phthalate, diallylacrylamide, triallyl (iso)cyanurate, and triallyl trimelitate; (poly)alkylene glycol di(meth)acrylate compounds including 1,6-hexanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, (poly)tetramethylene glycol di(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate,
- Graft-linking agents useful in the gloss reducing additives are polyethylenically unsaturated monomers copolymerizable with the monounsaturated monomers present in the second component, and having two or more non-conjugated double bonds of differing reactivity, as for example allyl methacrylate, diallyl maleate and allyl acryloxypropionate.
- the preferred graft-linking agent is allyl methacrylate.
- gloss reducing additives of the second component comprise a (meth)acrylate copolymer having a glass transition temperature of greater than or equal to 40 °C, measured via DSC, second heat All individual values and subranges from greater than 40° C are included herein and disclosed herein; for example, the glass transition temperature of the (meth)acrylate copolymer of the second component can be from a lower limit of 40, 45, 50, 55, 60, 70, 80, 90, or 100° C. For example, the glass transition temperature may be in the range of from greater than 40° C, or from greater than 55° C.
- (meth)acrylate means acrylate and/or methacrylate.
- the gloss reducing additives of the second component may further comprise one or more copolymers selected from styrenic polymers comprising one or more styrenic monomer units.
- the gloss reducing additives of the second component may further comprise one or more (meth)acrylate/styrenic copolymers comprising an amount derived from one or more (meth)acrylate monomer units selected from the group of C 1 -C 18 (meth)acrylates and one or more styrenic monomer units.
- Exemplary additional monomer units useful in the gloss reducing additives of the second component include styrene, acrylonitrile, blends thereof and combinations thereof.
- (Meth)acrylate copolymers useful in the gloss reducing additives of the second component include one or more C 1 -C 18 alkyl (meth)acrylate monomer units, including, by way of example and not limitation, butyl acrylate, ethylacrylate, 2-ethyl hexyl acrylate, propyl acrylate, methyl acrylate, hexyl acrylate, butylmethacrylate, methylmethacrylate, ethylhexyl methacrylate, stearyl acrylate, benzyl acrylate, blends thereof, and combinations thereof.
- C 1 -C 18 alkyl (meth)acrylate monomer units including, by way of example and not limitation, butyl acrylate, ethylacrylate, 2-ethyl hexyl acrylate, propyl acrylate, methyl acrylate, hexyl acrylate, butylmethacrylate, methylmethacrylate
- thermoplastic composition comprising the melt blending product of a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising units derived from one or more (meth)acrylate monomers and from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally comprises from 0.001 to 0.04 PHM derived from of one or more crosslinking monomers and/or graft-linking agents.
- the weight percentage of the core may be from 50 to 95 wt % and the one or more shells may be from 5 to 50 wt %, based on the total weight of the one or more core/shell polymers. All individual values and subranges of the amount of the core in the one or more core/shell polymers are included herein and disclosed herein; for example, the core may be from a lower limit of 50, 60, 70, 80, or 90 wt % of the total weight of the one or more core/shell polymers; and from an upper limit of 55, 65,75, 85, or 95 wt % of the total weight of the one or more core/shell polymers.
- the amount of core in the one or more core/shell polymers may range from 50 to 95 wt%; or from 55 to 75 wt %; or from 65 to 35 wt%; or from 50 to 65 wt%, based on the total weight of the one or more core/shell polymers. All individual values and subranges of the amount of one or more shells in the one or more core/shell polymers are included herein and disclosed herein; for example, the one or more shells may be from a lower limit of 5, 15, 25, 35, or 45 wt % of the total weight of the one or more core/shell polymers; and from an upper limit of 15, 25, 35, 45, or 50 wt % of the total weight of the one or more core/shell polymers.
- the amount of the one or more shells in the one or more core/shell polymers may range from 5 to 50 wt%; or from 25 to 45 wt %; or from 15 to 35 wt%; or from 35 to 50 wt%, based on the total weight of the one or more core/shell polymers.
- the thermoplastic composition comprises a first component comprising one or more thermoplastic polymers, as described hereinabove.
- the thermoplastic composition comprises from 2 to 20 PHR of a second component comprising one or more core/shell polymers. All individual values from 2 to 20 PHR are included herein and disclosed herein; for example, the second component may be present in an amount from a lower limit of 2, 8, 12, 15, or 17 PHR, to an upper limit of 3, 8, 13, 17 or 20 PHR.
- the core/shell polymers have a volume average particle size in the range of from 70 to 250 nm. All individual values and subranges from 70 to 250 nm are included herein and disclosed herein; for example, the average polymer particle size can be from a lower limit of 70, 100, 150, 200, 250 or 300 nm to an upper limit of 100, 200 or 250, nm.
- the average polymer particle size may be in the range of from 70 to 250 nm, or from 70 to 150 nm, or from 70 to 100 nm, or from 100 to 250 nm, or from 150 to 250 nm, or from 300 to 250 nm.
- the one or more core/shell polymers comprise a crosslinked core and an optionally crosslinked thermoplastic shell.
- the core/shell polymers may be produced via emulsion polymerization process, which produces a crosslinked core and an optionally crosslinked thermoplastic shell.
- the core comprises a crosslinked core comprising units derived from one or more (meth)acrylate monomers and from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, polymerized to give a (meth)acrylate copolymer that has a glass transition temperature of equal to or greater than 10 °C.
- the (meth)acrylate copolymer useful in the core is as described hereinabove in connection with the gloss reducing additive.
- the core/shell particles comprise one or more thermoplastic shells having a glass transition temperature of greater than or equal to 60 °C. All ranges and subranges of greater than or equal to 60 °C are included herein and disclosed herein; for example, the Tg of the thermoplastic shells can be equal to or greater than 65 °C; or equal to or greater than 70 °C; or qual to or greater than 75 °C; or equal to or greater than 80 °C; or equal to or greater than 85 °C.
- the one or more thermoplastic shells are comprised predominantly of MMA monomer units.
- predominantly means greater than 55 and less than 100 percent by weight, based on the total weight of the thermoplastic shell. All individual ranges and subranges between greater than 55 and less than 100 percent by weight are included herein and disclosed herein; for example, the one or more thermoplastic shells may have an optionally crosslinked MMA content by weight of greater than a lower limit of 55, 70, 80, or 90 percent and an upper limit of 99, 90, 85, or 75 percent.
- the thermoplastic shells may comprise units derived from MMA in the range of 55 to 99; or from 70 to 85; from 80 to less than 100 percent by weight, based on the total weight of the thermoplastic shell.
- the one or more thermoplastic shells may further comprise one or more (meth)acrylate copolymers, one or more (meth)acrylate/styrenic copolymers, one or more styrenic copolymers, or combinations thereof, all of which may include those options as described in connection with the gloss reducing additives.
- the (meth)acrylate copolymer of the one or more thermoplastic shells comprises between 50 and 95 percent by weight methylmethacrylate units and between 5 and 50 percent by weight units of ethylacrylate and/or butylacrylate.
- ethylacrylate and/or butylacrylate means solely ethylacrylate, solely butylacrylate or a combination of ethylacrylate and butylacrylate present.
- the (meth)acrylate copolymer of the one or more thermoplastic shells comprises from 68 to 72 wt % derived from methylmethacrylate units and from 28 to 32 wt % derived from ethylacrylate units.
- the one or more shells may further comprise from 0.001 to 0.014 PHM derived from one or more crosslinking monomers and/or graft-linking agents. All ranges and subranges from 0.001 to 0.04 PHM are included herein and disclosed herein; for example, units derived from one or more crosslinking monomer and/or graft-linking agents may be present from an upper limit of 0.04, 0.03, 0.02, 0.01, or 0.008 PHM to a lower limit of 0.001, 0.003, 0.005, 0.006 or 0.009 PHM.
- units derived from one or more crosslinking monomers and/or graft-linking agents in the one or more shells may be in the range of from 0.001 to 0.04 PHM, or from 0.003 to 0.03 PHM, or from 0.005 to 0.02 PHM.
- the method for producing a thermoplastic composition comprises the steps of: selecting a first component comprising one or more thermoplastic polymers; selecting a second component comprising one or more polymers which comprise a crosslinked core comprising units derived from one or more (meth)acrylate monomers and 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, polymerized to give a (meth)acrylate copolymer that has a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a glass transition temperature of greater than or equal to 60 °C; and melt kneading the second component into the first component.
- an article produced from the thermoplastic composition has a gloss measured according to ASTM D523 that is substantially independent of a shear rate during the melt kneading.
- substantially independent of a shear rate means that the gloss does not change by more than 10 units of gloss, at a 75 degree angle, over a 5 fold increase in extruder rpm.
- the inventive thermoplastic compositions exhibit a gloss measured according to ASTM D523 which is not increased by more than 10% following thermoforming of an article from the thermoplastic composition.
- the invention further provides an article comprising any one or more of the inventive thermoplastic compositions.
- the thermoplastic compositions disclosed herein can be used to manufacture durable articles for the automotive, construction, medical, food and beverage, electrical, appliance, business machine, and consumer markets.
- the thermoplastic compositions are used to manufacture flexible durable parts or articles selected from window profiles, house siding, household appliances, and automotive interior and exterior trims. Additionally the thermoplastic compositions of the present invention may also be formed into consumer and sporting-goods.
- thermoplastic compositions can be used to prepare these durable parts or articles with known polymer processes such as extrusion (e.g., sheet extrusion and profile extrusion); molding (e.g., injection molding, rotational molding, and blow molding); and blown film and cast film processes.
- extrusion is a process by which a polymer is propelled continuously along a screw through regions of high temperature and pressure where it is melted and compacted, and finally forced through a die.
- the extruder can be a single screw extruder, a multiple screw extruder, a disk extruder or a ram extruder.
- the die can be a film die, blown film die, sheet die, pipe die, tubing die or profile extrusion die.
- injection molding is also widely used for manufacturing a variety of plastic parts for various applications.
- injection molding is a process by which a polymer is melted and injected at high pressure into a mold, which is the inverse of the desired shape, to form parts of the desired shape and size.
- the mold can be made from metal, such as steel and aluminum.
- Molding is generally a process by which a polymer is melted and led into a mold, which is the inverse of the desired shape, to form parts of the desired shape and size. Molding can be pressureless or pressure-assisted.
- Rotational molding is a process generally used for producing hollow plastic products. By using additional post-molding operations, complex components can be produced as effectively as other molding and extrusion techniques. Rotational molding differs from other processing methods in that the heating, melting, shaping, and cooling stages all occur after the polymer is placed in the mold, therefore no external pressure is applied during forming.
- Blow molding can be used for making hollow plastics containers. The process includes placing a softened polymer in the center of a mold, inflating the polymer against the mold walls with a blow pin, and solidifying the product by cooling.
- blow molding There are three general types of blow molding: extrusion blow molding, injection blow molding, and stretch blow molding. Injection blow molding can be used to process polymers that cannot be extruded. Stretch blow molding can be used for difficult to blow crystalline and crystallizable polymers such as polypropylene.
- Articles produced from the inventive thermoplastic compositions exhibit a lower gloss than articles produced from solely the first component thermoplastic polymers. Specifically, an article formed from the inventive thermoplastic compositions exhibits a gloss of less than or equal to 65 measured at a 75 degree angle according to ASTM D523.
- thermoplastic compositions described herein exhibit an impact strength which is not substantially less than the impact strength articles produced from solely the first component thermoplastic polymers.
- an article formed from the inventive thermoplastic compositions exhibits an impact strength measured according to ASTM D4226 that is at least 90% of the impact strength of an article formed from the first component thermoplastic polymer without a second component.
- thermoplastic compositions of the present invention may further include additional additives including, but are not limited to, antistatic agents, color enhancers, dyes, lubricants, fillers, flame retardants, pigments, primary antioxidants, secondary antioxidants, processing aids, impact modifiers, UV stabilizers, plasticizers, blends thereof, and combinations thereof.
- additional additives including, but are not limited to, antistatic agents, color enhancers, dyes, lubricants, fillers, flame retardants, pigments, primary antioxidants, secondary antioxidants, processing aids, impact modifiers, UV stabilizers, plasticizers, blends thereof, and combinations thereof.
- inventive thermoplastic compositions may contain any amounts of additives.
- the inventive thermoplastic compositions may compromise from greater than 0 to less than 60 weight percent of the combined weight of such additives, based on the weight of the inventive thermoplastic composition including such additives.
- thermoplastic compositions may compromise from 0 to 60 wt% of the combined weight of additives; or from 0 to 50 wt%; or from 0 to 30 wt%; or from 0 to 20 wt%; or from 0 to 10 wt%; or from 0 to 5 wt%.
- the term PHR means parts per hundred resin by weight.
- 10 PHR additive means 10 parts by weight of additive per 100 parts by weight resin. More specifically, for example, 10 PHR additive may mean 10 pounds of additive per 100 pounds of resin.
- PHM means parts per hundred monomer.
- 0.04 PHM crosslinking monomer in a core/shell polymer comprising (meth)acrylate monomer units means that the core/shell polymer has 0.04 parts per 100 parts of the (meth)acrylate monomers.
- Table 1 lists the source and composition of the components used in preparing the Inventive and Comparative Examples.
- Table 1 Component Composition
- the second components added to each of Examples 1-4 were prepared according to the following procedure, which is a two shot emulsion polymerization method.
- the compositions of the second components added to each of Examples 1-4 varied by amount of EGDMA and had an overall composition of 84 PHR MMA / 4 PHR BMA / 12 PHR BA / variable amounts (PHM) of EGDMA.
- a monomer emulsion mixture consisting of: (1) 566 grams methyl methacrylate, 27 grams butyl methacrylate, 81 grams of butyl acrylate, and a variable amount of ethylene glycol dimethacrylate ("EGDMA") in 500 grams of water; (2) a solution of 1 gm of sodium persulfate in 20 gms water, and (3) and a solution of 0.11 grams of sodium formaldehyde sulfoxylate in 10 grams of water was then added to the glass reactor. The temperature of the glass reactor was maintained at 40 ( ⁇ 2) °C.
- the second components used in each of Examples 1, 2, 3, and 4 were produced using 0.14,0.034,0.07, and 0.14 PHM of EDGMA, respectively.
- the second component used in Comparative Example 1 was produced as above using no EGDMA.
- the resulting latex in the glass reactor was cooled to 40 °C and 43 grams (49.74% solids). of a DOWFAX 2A1 surfactant was added to the latex.
- the second component samples were extruded in a PVC formulation using a Haake, conical, twin screw extruder. Zone 1 was set at 165 °C; zone 2 set at 175 °C; zone 3 set at 175 °C.
- the RPMS were set at 40, and a 2 inch die with a die gap of 30 mils was used. The die was set at 175 °C.
- the PVC formulation is shown in Table 2 and is referred to herein as the PVC masterbatch.
- This masterbatch formulation was blended in a high speed mixer and the second components were post added to the master batch at 5 PHR based on PVC resin (i.e., OxyVinylsTM 222)(50 grams of second component and 1174 grams of PVC master batch).
- Table 3 provides the results of gloss testing according to ASTM D523 of each of Examples (Ex.) 1-4 and Comparative Example (Comp. Ex.) 1.
- Table 3 Example PHM EGDMA in the second component Gloss, 60° angle Comp. Ex. 1 - 70.4 Ex. 1 * 0.0025 42.0 Ex. 2 * 0.005 30.1 Ex. 3 * 0.01 31.5 Ex. 4 * 0.02 60.5 * (not according to the invention)
- the surface gloss of the inventive thermoplastic blends goes through a minimum as the amount of EGDMA cross linker is increased.
- an optimal level of EGDMA is between 0.005 and 0.01 PHM EGDMA for this thermoplastic blend composition and process. Higher levels of EGDMA nevertheless showed lower gloss than Comparative Example 1 with no second component.
- Table 4 provides the gloss and other properties of Examples 5-9 and Comparative Examples 2-3.
- a second component (70 wt % MMA / 30 wt % EA / 0.01 PHM EGDMA), as described below, was added at 5 PHR and 10 PHR based on the resin ParloidTMLFR-2006 to form Examples 10 and 11, respectively.
- the second component of Examples 10 and 11 was prepared according to the general procedure outlined in Example 1.
- the composition of the polymer thus prepared is 70 wt% MMA / 30 wt% EA / 0.01 PHM EGDMA.
- Table 5 illustrates that the gloss reduction is proportional to the level of second component in the formulation and that the level of second component does not negatively affect impact resistance.
- Comparative Example 1 is the base PVC formulation shown in Table 2 with no gloss reducing additive.
- the gloss reducing additive used in Example 12 was made according to the following procedure: * (not according to the invention)
- the resulting latex was then cooled to 40°C.
- the reactor contents were then discharged through cheesecloth.
- the second component was isolated by drying in a vacuum oven at 50°C for 40 hrs or until the moisture content was less than 0.5%.
- the second component prepared as described hereinabove was added solely to Example 12 and not to any of Comparative Examples 1, 4, and 5.
- Table 6 illustrates both gloss reduction and impact resistance effects of Example 12 and Comparative Examples 5-7 in PVC as the matrix polymer. PVC was extruded in the same way as Examples 1-4. Table 6 Example PHR Second Component Gloss, 20 degree angle Gloss, 60 degree angle Gloss, 85 degree Angle Dart Impact In-lb/40 mils Comp.Ex.1 0 21 72 82 140 Ex. 12 * 5 2.7 19 63 160 Comp. Ex. 5 5 2.1 12 15 60 Brittle Failure Comp. Ex. 4 5 5.4 33 44 124 Brittle Failure
- Table 6 illustrates that while gloss can be lowered using large, highly crosslinked polymeric particles, the use of such materials reduced the dart impact resistance of the thermoplastic blend and resulted in brittle failure.
- the lightly crosslinked second component utilized in Example 12 both lowered gloss and maintained impact resistance.
- Examples 13-18 utilize crosslinking monomers other than EGDMA but at a concentration which provides an equal number of moles of double bonds as provided by 0.012 PHM EGDMA (i.e., molar equivalents).
- Each of Examples 13-18 were formed as 10 PHR of second component per 100 parts of PARALOIDTM LFR-2006. All of Examples 13-18 have a composition of 70 wt % MMA / 30 wt % EA / variable amounts of crosslinking monomer (as specified in Table 7) and were made according to the general procedure described in Example 1. Comparative Example 3 is the PARALOIDTM LFR-2006 with no second component.
- BGDMA butylene glycol dimethacrylate
- DVB divinyl benzene
- ALMA Allyl methacrylate
- TMPTA trimethylolpropane triacrylate
- BGDA butylenes glycol diacrylate.
- Example 19 was prepared as described above in connection with Example 12 except that the final formulation of the second component used in Example 19 has a final composition ratio of 70 wt % MMA/30 wt % EA/0.012 PHM EGDMA.
- Example 19 was prepared by mixing 10 PHR of the second component with 100 parts PARALOID TM LFR-2006. Extrusion was conducted using the same procedure as for Examples 2 - 9 with the exception that the RPMs of the extruder were varied from 20 to 100 to examine the effect of extruder speed on gloss reduction.
- Comparative Example 3 is PARALOID TM LFR-2006 with no second component The results are shown in Table 8. * (not according to the invention) Table 8 Extruder RPM Output rate Puller Setting Gloss, 75 degree angle Example 19 Gloss, 75 degree angle Comparative Example 3 20 12 32.4 108.5 50 20 31.2 105.7 100 39 28.4 105.5
- Table 8 illustrates that the extruder RPMs do not appear to have any appreciable impact on the gloss reduction achieved with the inventive thermoplastic composition. Because the gloss is not dependent on extruder RPMs (shear and throughput rate), the gloss reduction is not likely to be caused by conventional melt fracture. In a melt fracture mechanism for gloss reduction, increasing extrusion rate increases the amount of melt fracture and gloss should decrease with increasing shear rate.
- Example 20 was prepared as described above in connection with Example 1 except that the final formulation of the second component used in Example 20 has a final composition ratio of 70 wt % MMA/30 wt % EA/0.014 PHM BGDMA.
- Example 20 was prepared by mixing PARALOID TM Low-2006, with a ratio of 10 PHR second component.
- Example 20 and Comparative Example 3 were extruded the same as were Examples 2-9 except that the zones were adjusted to give the melt temperatures shown in Table 9. * (not according to the invention) Table 9 Melt Temperature, °C Gloss, 75 Degree angle Example 20 Gloss, 75 Degree angle Comparative Example 3 185 37.5 102.1 199 32.7 - 219 29.9 - 229 31.5 114
- Example 10 lists the compositions of Examples 21-23. Comparative Examples 6-8 are matrix polymers with no second component added. The second component used in each of Examples 21-23 was prepared using the process described in Example 1, except that the final composition ratio of 70 wt % MMA/30 wt % EA/0.01 PHM EGDMA. The second component was added at 10 PHR in each case to the different matrix polymers and extruded using the same procedure as for Examples 5 - 9.
- Table 11 includes the gloss and impact resistance for each of Examples 21-23 and Comparative Examples 6-8.
- the lightly crosslinked second components used in the inventive thermoplastic composition using a variety of matrix polymers is effective at significantly reducing the gloss over that of the matrix polymer without the second component.
- the inventive thermoplastic compositions based on PVC and impact modified PMMA copolymers also exhibit reduction in gloss and good impact resistance.
- Example 12 The effect of heating a test specimen, mimicking the effect of thermal forming, was tested by measuring the gloss of an extruded sheet before and following heating at 165 °C for 20 minutes in an oven.
- Extruded sheets were prepared using Example 12 (described above); Comparative Example 9 containing LFR-2006 and 10 PHR of PARALOID TM EXL-5136; Comparative Example 5 as previously stated, containing LFR-2006 and 5 PHR of PARALOID TM KF-710; and Comparative Example 3 containing solely PARALOID TM LFR-2006.
- Table 12 In comparison to each of Comparative Examples 9 and 5, Example 12 showed no increase in gloss following heating, and, in fact, exhibited a slight decrease in gloss following heating.
- a seed latex was first prepared by adding 500 grams deionized water and 0.04 grams sodium hydroxide to a round bottom five liter glass reactor. The reactor was stirred at 100 rpm and heated to 40° C with sparging with dry nitrogen for 30 minutes. 4 grams (49.74% solids) of Dowfax 2A1, 0.05 grams sodium EDTA, and 0.03 grams iron sulfate heptahydrate were added to the reactor. The temperature was held at 40( ⁇ 2) °C.
- Comparative Example 10 was prepared by the following procedure: 1100 grams deionized water and 138 grams of the seed (preparation described above, at 36% solids) were charged to a round bottom five liter glass reactor. The reactor was stirred at 100 rpm and heated to 40 °C with sparging with dry nitrogen for 30 minutes. 4 grams (49.74% solids) of a Dowfax 2A1 surfactant were added to the reactor. The temperature was adjusted to between 79-81°C. A mixture of: (1) 384 grams methyl methacrylate, 165 grams ethylacrylate and 1.38 grams of ethylene glycol dimethacrylate, (2) a solution of 2 grams of sodium persulfate in 60 grams water was added to the reactor over a period of 4 hours. The temperature was then held at 80°C for another 120 minutes after which the mixture was discharged from the reactor through a 150 mesh filter.
- Comparative Examples 11 and 12 were made by using 45 and 125 grams of the latex seed described above, respectively.
- the second component was added at a level of 10 PHR based on LFR-2006, except for Comparative Example 3 which is solely LFR-2006.
- Example 13 was prepared as previously described.
- the second component of Comparative Examples 20-23 (LTL4671/4672/4673/ MLK8528) was prepared by the following procedure:
- Example 13 450 grams deionized water and 136 grams of the latex of Example 13 as a seed latex were charged to a round bottom five liter glass reactor. The reactor was stirred at 100 rpm and heated to 40° ( ⁇ 2)C with sparging with dry nitrogen for 30 minutes. 3 grams (49.74% solids) of a Dowfax 2A1 surfactant, 0.05 grams sodium EDTA, and 0.03 grams iron sulfate heptahydrate were added to the reactor. The temperature was adjusted to 40( ⁇ 2) °C.
- Comparative Examples 10-12 As the particle size increases, the gloss starts to drop, but not as efficiently as in the inventive thermoplastic composition like.
- Example 13 These examples contain 0.25 PHM of EGDMA and are moderately crosslinked.
- Comparative Examples 13-16 are made according to the method that the inventive thermoplastic compositions are made, except they are made with a larger particle size. Despite the larger particle size, Comparative Examples 13-16 do not show a drop in gloss as would be expected from a gloss reduction mechanism depending upon large particles sticking out of the surface.
- Each of the examples in Table 14 includes the second component at a level of 10 PHR per PARALOIDTM LFR-2006 and extruded using the same procedure as for Inventive Examples 5-9.
- Example 13 The samples were made according to the procedure outlined in Example 13. The MMA/EA ratio was varied from 86 : 14 to 60 : 40.
- Examples 24-27 each contained 5 PHR the second component per 100 parts of the PVC in the masterbatch of Table 2. To show the effect of polymer Tg on gloss reduction, additives were added to the PVC master batch formulation and extruded as described in Comparative Ex 1. Examples 24-27 each contained 5 PHR the second component per 100 parts of PVC in the master batch. As shown in Table 15, as Tg was lowered, gloss decreased and leveled off at a calculated Tg around 60 °C.
- Example 24 86 wt % MMA/14 wt % EA/0.015 PRIM EGDMA * 80.5 60
- Example 25 80 wt % MMA/20 wt % EA/0.015 PHM EGDMA * 74.3 34
- Example 26 70 wt % MMA/30 wt % EA/0.015 PHM EGDMA * 60.9 19
- Example 27 60 wt % MMA/40 wt % EA/0.015 PHM EGDMA * 48.6 17
- a core polymer is first made and a shell of PMMA is placed on the core.
- example 28 is just the core with no shell.
- the shell can be made with or without crosslinking monomer.
- the shell has a Tg of 105 °C.
- the core polymers were prepared by the general procedure outlined for Example 13 except that different MMA to EA ratios were used to obtain the target Tg.
- a shell layer of either crosslinked or uncrosslinked MMA is added by the following procedure:
- Polymer Particle Size Polymer particle size was measured using very dilute aqueous dispersions, i.e., latexes (diluted to 0.001% solids) with a BI 90 (Brookhaven Instruments, Holtsville, NY) particle size detector, utilizing Dynamic Light Scattering (15° and 90° scattering angles) and a laser light source. The signal was detected by a photodiode array and the data analyzed with a built in correlator.
- Gloss was measured according to ASTM D523. Specifically, gloss was measured on test samples using a Byk-Gardner hand held micro-gloss meter. Gloss was measured using 20, 60, 75, and 85 degree gloss meter geometries. For samples that were unpigmented, a black background was placed under the test sample before measuring gloss. Measurements were the average of three readings.
- Solution Viscosity Polymer samples were dissolved in di(propylene glycol) methyl ether (97% purity from Aldrich Chemical) as a 5% solution by shaking overnight. 4 oz. straight walled bottles were used containing 90 grams of total solution. The dissolved polymer was placed in a 25 °C water bath for 20 minutes and then the viscosity was measured using a Brookfield RVT viscometer. Spindle 5 was used at 100 rpms.
- Percent Transmittance The 5% solutions prepared for solution viscosity measurements were placed in 1 cm path length cells for a visible spectrophotometer. The percent transmittance was read against a blank of the pure solvent.
- Impact was measured according to ASTM 4226, i.e., dart impact, on 2 inch wide extruded strips of polymer that were about 40 mils in thickness.
- a Gardener drop dart tester was used with a 2 lb weight. The dart had a 0.5 inch diameter, round tip. The height in inches needed to cause any breakage of the strip was recorded. The thickness of the strip was measured with a micrometer.
- Surface Roughness Samples strips for testing were made by extrusion as describe in the relevant example. Roughly 3 by 5 cm sections were cut and adhered to 5 cm by 9 cm aluminum plates with double-sided tape.
- Opacity was determined by visual inspection of the solution with a rating scale from 1 to 10. A rating of 1 indicates a perfectly clear solution and a rating of 10 indicates an opaque solution.
- the glass transition is measured in a TA Instruments Q1000 Differential Scanning Calorimeter using a small sample of the polymer (5-20 mg) sealed in a small aluminum pan. The pan is placed in the DSC apparatus, and its heat flow response is recorded by scanning at a rate of 10° C/min from room temperature up to 180° C. The glass transition temperature is observed as a distinct shift in the heat flow curve.
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Description
- The instant invention relates to a thermoplastic composition, a method for forming articles therefrom, and articles made therefrom.
- Many applications of thermoplastic materials require a low gloss surface, including for example, thermoplastic panels with a wood-like appearance. Current approaches used to lower plastic surface gloss include the use of 5 to 15 wt% of 1 to 10 micron sized inorganic fillers and/or crosslinked polymeric particles plastic additives based on the total weight of the plastic formulation (i.e., base plastic or polymer plus all additives). Such inorganic and polymeric particles generally lower surface gloss by extending from the plastic surface providing a rough surface which destructively scatters light thereby decreasing gloss. Such additives, however, tend to significantly reduce the impact resistance of the plastic to which they are added. In addition, such additives generally make the final plastic formulation opaque.
- Another issue with such known additives is the inability to maintain low gloss. Specifically, such particulate additives tend to be covered by the plastic material upon exposure to heat as the matrix polymer tends to flow around and over the particulate additives when heated after initial processing. For example, during thermal forming (or thermoforming), gloss will increase significantly for plastics with particulate additives. The particulate additive approach to decreasing the gloss of plastic surfaces is further subject to furnishing. Burnish resistance is the term used to describe resistance to gloss increase by rubbing. That is, the portion of the particulates which extend out from the plastic surface may be removed or broken off with rubbing of the plastic surface thereby leading to a smoother surface and increased gloss. A plastic formulation with low surface gloss, good impact resistance, good burnish resistance and which may be heat treated post initial processing without a substantial increase in gloss would be very desirable. Moreover, it would be desirable to have a plastic formulation in which the gloss reduction additive is compatible with the thermoplastic polymer matrix so as to provide a uniform sheet in melt processing, and specifically which is compatible with polymethyl methacrylate ("PMMA"), acrylonitrile butadiene styrene polymer ("ABS"), poly(styrene-co-acrylonitrile) ("SAN"), polyvinylchloride ("PVC"), acrylonitrile/styrene acrylate ("ASA"), chlorinated polyvinylchloride ("CPVC"), polylactic acid ("PLA"), polycarbonate ("PC"), polyesters, such as poly(ethylene terephthalate) ("PET"), poly(butylene terephthalate) ("PBT"), and polyethylene terephthalate glycol ("PETG").
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EP0621291 is recognised as the closest prior-art of the current invention and discloses processes for preparing polymeric gloss modifiers capable of reducing the surface gloss of a thermoplastic resin such as polyvinyl chloride, said gloss modifiers being based on core-shell (meth)acrylic copolymers crosslinked with 0.5 wt % of crosslinking monomer. -
EP1061100 discloses PVC compositions incorporating a gloss-reducing composition based on the combination of core-shell acrylic copolymers having a crosslinked core comprising C1-C8 alkyl acrylate monomers and 0.1 to 5 parts by weight of crosslinker or graftlinker. - The invention is a thermoplastic composition, a method for forming articles therefrom, articles made therefrom, and methods for making such articles.
- In one aspect, the invention relates to a thermoplastic composition comprising the melt blending product of a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising a (meth)acrylate copolymer having a glass transition temperature of greater than or equal to 10°C and from 0.001 and 0.04 parts by weight per hundred parts by weight of the total weight of the one or more (meth)acrylate monomers derived from one or more crosslinking monomers and/or graft-linking agents, and one or more, optionally crosslinked, thermoplastic shells having a Tg of equal to or greater than 60°C wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers, and wherein the glass transition temperature is measured using differential scanning calorimetry at a rate of 10°C/min from room temperature up to 180°C.
- In one embodiment of the invention, the thermoplastic composition comprises comprising the melt blending product of: a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents and one or more (meth)acrylate monomers polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally contains from 0.001 to 0.04 PHM units derived from one or more crosslinking monomers and/or graft-linking agents, wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers.
- In another embodiment, the one or more (meth)acrylate copolymers comprise one or more monomers selected from the group consisting of C1-C18 alkyl (meth)acrylate monomer units and combinations thereof, wherein the one or more styrenic copolymers comprise one or more monomers selected from styrene monomers, acrylonitrile monomers, and combinations thereof, and wherein the one or more (meth)acrylate/styrenic copolymers comprise units derived from one or more monomers selected from the group of C1-C18 alkyl (meth)acrylate monomer units and combinations thereof and one or more monomers selected from styrene monomers, acrylonitrile monomers, and combinations thereof and optionally comprise from 0.001 to 0.04 PHM of units derived from one or more crosslinking monomers and/or graft-linking agents and combinations thereof.
- In an alternative embodiment of the invention, the second component has a polymer particle volume average size from 70 to 250 nm.
- In an alternative embodiment, the one or more (meth)acrylate copolymer of the one or more gloss reducing additives comprise from 50 to 95 percent by weight units derived from methylmethacrylate units and from 5 to 50 percent by weight units derived from ethylacrylate and/or butylacrylate units. In an alternative embodiment of the invention, the one or more (meth)acrylate copolymers of the second component comprise from 65 to 85 % by weight of units derived from methylmethacrylate and from 35 to 15 wt % units derived from ethylacrylate units and further wherein the gloss reducing additive comprises from 0.002 to 0.015 PHM of units derived from EDGMA.
- In an alternative embodiment of the invention, the inventive thermoplastic composition has an impact value that is at least 90 % of the impact value of the first component.
- In another aspect, the invention relates to a method for forming an article comprising the steps of selecting a thermoplastic composition according to Claim 1; and forming the thermoplastic composition into an article.
- In one embodiment of the invention, the method for forming an article comprises:
- selecting an inventive thermoplastic composition; and forming the thermoplastic composition into an article. In an alternative embodiment of the invention, the forming of the thermoplastic composition into the article is selected from injection molding, rotational molding, thermoforming, calendering, extrusion, compression molding, and blow molding.
- Another alternative embodiment of the invention provides an article formed from an inventive method. In an alternative embodiment of the invention, the article made from an inventive thermoplastic composition and/or according to an inventive method has a gloss which is substantially independent of the shear rate during the step of forming the thermoplastic composition into the article.
- In an alternative embodiment, the one or more thermoplastic polymers of the first component are selected from the group consisting PMMA, poly(styrene-co-acrylonitrile), acrylonitrile butadiene styrene polymer, polyamides, polyacrylates, thermoplastic polyesters, polyvinyl chloride, chlorinated polyvinyl chloride, polycarbonate, polylactic acid, polymethacrylate, acrylonitrile/styrene acrylate (ASA), polystyrene, blends thereof and combinations thereof.
- The application further discloses a test specimen produced from the thermoplastic composition that has a gloss of less than or equal to 65 at a 75 degree angle.
- The application further discloses a gloss of a test specimen produced from the thermoplastic composition that is not increased by more than 10% following thermoforming of the test specimen.
- In an alternative embodiment, the crosslinking and/or graft-linking monomers are selected from the group consisting of divinylbenzene, trimethylolpropane triacrylate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, allyl methacrylate, diallyl phthalate, diallylacrylamide, triallyl (iso)cyanurate, triallyl trimelitate, (poly)alkylene glycol, 1,6-hexanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, (poly)tetramethylene glycol di(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol di(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol penta(meth)acrylate, graft-linking monomers having two or more non-conjugated double bonds of differing reactivity, such as allyl methacrylate, diallyl maleate and allyl acryloxypropionate, and combinations thereof.
- An alternative embodiment provides a thermoplastic composition consisting essentially of the melt blending product of: a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents and one or more (meth)acrylate monomers polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally contains 0.001 and 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers.
- An alternative embodiment provides a thermoplastic composition comprising the melt blending product of: a first component which consists essentially of one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents and one or more (meth)acrylate monomers polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally contains 0.001-and 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers.
- The instant invention provides a thermoplastic composition, a method for forming articles therefrom, articles made therefrom and methods for making such articles.
- The application discloses a thermoplastic composition comprising the melt blending product of: a first component comprising one or more thermoplastic polymers; and from 2 to 20 parts by weight per 100 parts by weight of the first component (PHR), of a second component comprising one or more gloss reducing additive copolymers wherein each gloss reducing additive copolymer comprises a (meth)acrylate copolymer derived from one or more (meth)acrylate monomers and 0.001 to 0.04 PHM (parts per hundred monomer based on the total weight of the one or more (meth)acrylate monomers) derived from one or more crosslinking monomers and/or graft-linking agents; wherein each gloss reducing additive copolymer has a glass transition temperature of greater than or equal to 40 °C and wherein a test specimen produced from the thermoplastic composition (that is 2 inches wide and 40 mils thick produced by extrusion through a film die) has a roughness according to DIN 4768 of Ra greater than or equal to 0.6 microns, Rz greater than or equal to 6 microns and Rmax greater than or equal to 7 microns, and a gloss less than 65 at a 75 degree angle.
- The thermoplastic composition according to the present invention comprises a first component of one or more thermoplastic polymers. Exemplary thermoplastic polymers useful in the first component include, but are not limited to, PMMA, SAN, ASA, ABS, polyamides, polyarylates, thermoplastic polyesters (such as, PET, PETG, and PBT), polyamides, polyacrylates, polyvinyl chloride, chlorinated polyvinylchloride, polycarbonate, polylactic acid, polystyrene, polymethacrylate; blends thereof, and combinations thereof.
- The thermoplastic composition comprises from 2 to 20 PHR of the second component, based on 100 parts of the first component. All individual values and subranges from 2 to 20 PHR are included herein and disclosed herein; for example, the PHR of the second component can be from a lower limit of 2, 3, 7, 9, 11,13,15,17 or 19 PHR to an upper limit of 5, 7, 10, 12, 14, 17, or 20 PHR. For example, the PHR of the second component may be in the range of from 2 to 20 PHR, or from 3 to 9 PHR, or from 7 to 19 PHR.
- The one or more gloss reducing additives comprise from 0.001 to 0.04 PHM units derived from one or more crosslinking monomers and/or graft-linking agents. As used here, the term "one or more multifunctional cross-linking monomers and/or graft-linking agents "means that one or more cross-linking monomers may be present, one or more graft-linking agents may be present or that one or more crosslinking monomers in combination with one or more graft-linking agent may be present. As used herein the terms "crosslinking monomer" and "graft-linking agent" mean monomeric units having two or more ethylenically unsaturated radicals capable of free-radical polymerization. All individual values and subranges from 0.001 to 0.04 PHM are included herein and disclosed herein; for example, an amount derived from the one or more crosslinking monomers and/or graft-linking agents may be present from a lower limit of 0.001, 0.003, 0.005, 0.006 or 0.009 PHM to an upper limit of 0.04, 0.03, 0.02, 0.01, or 0.008 PHM. For example, the PHM of units derived from the one or more crosslinking monomers and/or graft-linking agents may be in the range of from 0.001 to 0.04 PHM, or from 0.003 to 0.03 PHM, or from 0.005 to 0.02 PHM.
- A crosslinking monomer useful in the gloss reducing additives is a monomer that has two or more reactive groups that are capable of participating in a polymerization reaction. Exemplary crosslinking monomers include, but not limited to divinylbenzene, trimethyolpropane triacrylate, ethylene glycol dimethacrylate (EGDMA), butylene glycol dimethacrylate (BGDMA), trimethyolpropane trimethacrylate, allyl methacrylate, blends thereof, and combinations thereof. In some embodiments, the second component may contain from 0.001 to 0.04 PHM derived from crosslinking monomer selected from the group consisting of divinylbenzene; allyl compounds including diallyl phthalate, diallylacrylamide, triallyl (iso)cyanurate, and triallyl trimelitate; (poly)alkylene glycol di(meth)acrylate compounds including 1,6-hexanediol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, (poly)tetramethylene glycol di(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and dipentaerythritol penta(meth)acrylate.
- Graft-linking agents useful in the gloss reducing additives are polyethylenically unsaturated monomers copolymerizable with the monounsaturated monomers present in the second component, and having two or more non-conjugated double bonds of differing reactivity, as for example allyl methacrylate, diallyl maleate and allyl acryloxypropionate. The preferred graft-linking agent is allyl methacrylate.
- The application further discloses that gloss reducing additives of the second component comprise a (meth)acrylate copolymer having a glass transition temperature of greater than or equal to 40 °C, measured via DSC, second heat All individual values and subranges from greater than 40° C are included herein and disclosed herein; for example, the glass transition temperature of the (meth)acrylate copolymer of the second component can be from a lower limit of 40, 45, 50, 55, 60, 70, 80, 90, or 100° C. For example, the glass transition temperature may be in the range of from greater than 40° C, or from greater than 55° C. As used herein throughout "(meth)acrylate" means acrylate and/or methacrylate.
- In some embodiments, the gloss reducing additives of the second component may further comprise one or more copolymers selected from styrenic polymers comprising one or more styrenic monomer units.
- In some embodiments, the gloss reducing additives of the second component may further comprise one or more (meth)acrylate/styrenic copolymers comprising an amount derived from one or more (meth)acrylate monomer units selected from the group of C1-C18 (meth)acrylates and one or more styrenic monomer units.
- Exemplary additional monomer units useful in the gloss reducing additives of the second component include styrene, acrylonitrile, blends thereof and combinations thereof.
- (Meth)acrylate copolymers useful in the gloss reducing additives of the second component include one or more C1-C18 alkyl (meth)acrylate monomer units, including, by way of example and not limitation, butyl acrylate, ethylacrylate, 2-ethyl hexyl acrylate, propyl acrylate, methyl acrylate, hexyl acrylate, butylmethacrylate, methylmethacrylate, ethylhexyl methacrylate, stearyl acrylate, benzyl acrylate, blends thereof, and combinations thereof.
- Another embodiment of the invention provides a thermoplastic composition comprising the melt blending product of a first component comprising one or more thermoplastic polymers; and a second component comprising one or more core/shell polymers wherein said one or more core/shell polymers comprise a crosslinked core comprising units derived from one or more (meth)acrylate monomers and from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, polymerized to give a copolymer having a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a Tg of equal to or greater than 60 °C wherein the shell optionally comprises from 0.001 to 0.04 PHM derived from of one or more crosslinking monomers and/or graft-linking agents. The weight percentage of the core may be from 50 to 95 wt % and the one or more shells may be from 5 to 50 wt %, based on the total weight of the one or more core/shell polymers. All individual values and subranges of the amount of the core in the one or more core/shell polymers are included herein and disclosed herein; for example, the core may be from a lower limit of 50, 60, 70, 80, or 90 wt % of the total weight of the one or more core/shell polymers; and from an upper limit of 55, 65,75, 85, or 95 wt % of the total weight of the one or more core/shell polymers. The amount of core in the one or more core/shell polymers may range from 50 to 95 wt%; or from 55 to 75 wt %; or from 65 to 35 wt%; or from 50 to 65 wt%, based on the total weight of the one or more core/shell polymers. All individual values and subranges of the amount of one or more shells in the one or more core/shell polymers are included herein and disclosed herein; for example, the one or more shells may be from a lower limit of 5, 15, 25, 35, or 45 wt % of the total weight of the one or more core/shell polymers; and from an upper limit of 15, 25, 35, 45, or 50 wt % of the total weight of the one or more core/shell polymers. The amount of the one or more shells in the one or more core/shell polymers may range from 5 to 50 wt%; or from 25 to 45 wt %; or from 15 to 35 wt%; or from 35 to 50 wt%, based on the total weight of the one or more core/shell polymers.
- The thermoplastic composition comprises a first component comprising one or more thermoplastic polymers, as described hereinabove. The thermoplastic composition comprises from 2 to 20 PHR of a second component comprising one or more core/shell polymers. All individual values from 2 to 20 PHR are included herein and disclosed herein; for example, the second component may be present in an amount from a lower limit of 2, 8, 12, 15, or 17 PHR, to an upper limit of 3, 8, 13, 17 or 20 PHR.
- In some embodiments, the core/shell polymers have a volume average particle size in the range of from 70 to 250 nm. All individual values and subranges from 70 to 250 nm are included herein and disclosed herein; for example, the average polymer particle size can be from a lower limit of 70, 100, 150, 200, 250 or 300 nm to an upper limit of 100, 200 or 250, nm. For example, the average polymer particle size may be in the range of from 70 to 250 nm, or from 70 to 150 nm, or from 70 to 100 nm, or from 100 to 250 nm, or from 150 to 250 nm, or from 300 to 250 nm.
- The one or more core/shell polymers comprise a crosslinked core and an optionally crosslinked thermoplastic shell. The core/shell polymers may be produced via emulsion polymerization process, which produces a crosslinked core and an optionally crosslinked thermoplastic shell. The core comprises a crosslinked core comprising units derived from one or more (meth)acrylate monomers and from 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, polymerized to give a (meth)acrylate copolymer that has a glass transition temperature of equal to or greater than 10 °C. The (meth)acrylate copolymer useful in the core is as described hereinabove in connection with the gloss reducing additive.
- The core/shell particles comprise one or more thermoplastic shells having a glass transition temperature of greater than or equal to 60 °C. All ranges and subranges of greater than or equal to 60 °C are included herein and disclosed herein; for example, the Tg of the thermoplastic shells can be equal to or greater than 65 °C; or equal to or greater than 70 °C; or qual to or greater than 75 °C; or equal to or greater than 80 °C; or equal to or greater than 85 °C.
- In some embodiments, the one or more thermoplastic shells are comprised predominantly of MMA monomer units. As used herein throughout the term "predominantly" means greater than 55 and less than 100 percent by weight, based on the total weight of the thermoplastic shell. All individual ranges and subranges between greater than 55 and less than 100 percent by weight are included herein and disclosed herein; for example, the one or more thermoplastic shells may have an optionally crosslinked MMA content by weight of greater than a lower limit of 55, 70, 80, or 90 percent and an upper limit of 99, 90, 85, or 75 percent. For example the thermoplastic shells may comprise units derived from MMA in the range of 55 to 99; or from 70 to 85; from 80 to less than 100 percent by weight, based on the total weight of the thermoplastic shell.
- The one or more thermoplastic shells may further comprise one or more (meth)acrylate copolymers, one or more (meth)acrylate/styrenic copolymers, one or more styrenic copolymers, or combinations thereof, all of which may include those options as described in connection with the gloss reducing additives.
- In certain embodiments of the inventive thermoplastic shell composition, the (meth)acrylate copolymer of the one or more thermoplastic shells comprises between 50 and 95 percent by weight methylmethacrylate units and between 5 and 50 percent by weight units of ethylacrylate and/or butylacrylate. As used herein the term "ethylacrylate and/or butylacrylate" means solely ethylacrylate, solely butylacrylate or a combination of ethylacrylate and butylacrylate present.
- In yet other embodiments of the inventive thermoplastic composition, the (meth)acrylate copolymer of the one or more thermoplastic shells comprises from 68 to 72 wt % derived from methylmethacrylate units and from 28 to 32 wt % derived from ethylacrylate units.
- In some embodiments, the one or more shells may further comprise from 0.001 to 0.014 PHM derived from one or more crosslinking monomers and/or graft-linking agents. All ranges and subranges from 0.001 to 0.04 PHM are included herein and disclosed herein; for example, units derived from one or more crosslinking monomer and/or graft-linking agents may be present from an upper limit of 0.04, 0.03, 0.02, 0.01, or 0.008 PHM to a lower limit of 0.001, 0.003, 0.005, 0.006 or 0.009 PHM. For example, units derived from one or more crosslinking monomers and/or graft-linking agents in the one or more shells may be in the range of from 0.001 to 0.04 PHM, or from 0.003 to 0.03 PHM, or from 0.005 to 0.02 PHM.
- In another embodiment of the invention, the method for producing a thermoplastic composition comprises the steps of: selecting a first component comprising one or more thermoplastic polymers; selecting a second component comprising one or more polymers which comprise a crosslinked core comprising units derived from one or more (meth)acrylate monomers and 0.001 to 0.04 PHM derived from one or more crosslinking monomers and/or graft-linking agents, polymerized to give a (meth)acrylate copolymer that has a glass transition temperature of greater than or equal to 10 °C, and one or more thermoplastic shells having a glass transition temperature of greater than or equal to 60 °C; and melt kneading the second component into the first component.
- In some embodiments of the invention, an article produced from the thermoplastic composition has a gloss measured according to ASTM D523 that is substantially independent of a shear rate during the melt kneading. As used herein, the term "substantially independent of a shear rate" means that the gloss does not change by more than 10 units of gloss, at a 75 degree angle, over a 5 fold increase in extruder rpm. In some embodiments, the inventive thermoplastic compositions exhibit a gloss measured according to ASTM D523 which is not increased by more than 10% following thermoforming of an article from the thermoplastic composition.
- The invention further provides an article comprising any one or more of the inventive thermoplastic compositions. The thermoplastic compositions disclosed herein can be used to manufacture durable articles for the automotive, construction, medical, food and beverage, electrical, appliance, business machine, and consumer markets. In some embodiments, the thermoplastic compositions are used to manufacture flexible durable parts or articles selected from window profiles, house siding, household appliances, and automotive interior and exterior trims. Additionally the thermoplastic compositions of the present invention may also be formed into consumer and sporting-goods.
- The thermoplastic compositions can be used to prepare these durable parts or articles with known polymer processes such as extrusion (e.g., sheet extrusion and profile extrusion); molding (e.g., injection molding, rotational molding, and blow molding); and blown film and cast film processes. In general, extrusion is a process by which a polymer is propelled continuously along a screw through regions of high temperature and pressure where it is melted and compacted, and finally forced through a die. The extruder can be a single screw extruder, a multiple screw extruder, a disk extruder or a ram extruder. The die can be a film die, blown film die, sheet die, pipe die, tubing die or profile extrusion die.
- Injection molding is also widely used for manufacturing a variety of plastic parts for various applications. In general, injection molding is a process by which a polymer is melted and injected at high pressure into a mold, which is the inverse of the desired shape, to form parts of the desired shape and size. The mold can be made from metal, such as steel and aluminum.
- Molding is generally a process by which a polymer is melted and led into a mold, which is the inverse of the desired shape, to form parts of the desired shape and size. Molding can be pressureless or pressure-assisted.
- Rotational molding is a process generally used for producing hollow plastic products. By using additional post-molding operations, complex components can be produced as effectively as other molding and extrusion techniques. Rotational molding differs from other processing methods in that the heating, melting, shaping, and cooling stages all occur after the polymer is placed in the mold, therefore no external pressure is applied during forming.
- Blow molding can be used for making hollow plastics containers. The process includes placing a softened polymer in the center of a mold, inflating the polymer against the mold walls with a blow pin, and solidifying the product by cooling. There are three general types of blow molding: extrusion blow molding, injection blow molding, and stretch blow molding. Injection blow molding can be used to process polymers that cannot be extruded. Stretch blow molding can be used for difficult to blow crystalline and crystallizable polymers such as polypropylene.
- Articles produced from the inventive thermoplastic compositions exhibit a lower gloss than articles produced from solely the first component thermoplastic polymers. Specifically, an article formed from the inventive thermoplastic compositions exhibits a gloss of less than or equal to 65 measured at a 75 degree angle according to ASTM D523.
- Articles produced from the thermoplastic compositions described herein exhibit an impact strength which is not substantially less than the impact strength articles produced from solely the first component thermoplastic polymers. Specifically, an article formed from the inventive thermoplastic compositions exhibits an impact strength measured according to ASTM D4226 that is at least 90% of the impact strength of an article formed from the first component thermoplastic polymer without a second component.
- The thermoplastic compositions of the present invention may further include additional additives including, but are not limited to, antistatic agents, color enhancers, dyes, lubricants, fillers, flame retardants, pigments, primary antioxidants, secondary antioxidants, processing aids, impact modifiers, UV stabilizers, plasticizers, blends thereof, and combinations thereof. The inventive thermoplastic compositions may contain any amounts of additives. The inventive thermoplastic compositions may compromise from greater than 0 to less than 60 weight percent of the combined weight of such additives, based on the weight of the inventive thermoplastic composition including such additives. All individual values and subranges from about 0 to about 60 wt percent are included herein and disclosed herein; for example, the inventive thermoplastic compositions may compromise from 0 to 60 wt% of the combined weight of additives; or from 0 to 50 wt%; or from 0 to 30 wt%; or from 0 to 20 wt%; or from 0 to 10 wt%; or from 0 to 5 wt%.
- As used herein, the term PHR means parts per hundred resin by weight. For example, 10 PHR additive means 10 parts by weight of additive per 100 parts by weight resin. More specifically, for example, 10 PHR additive may mean 10 pounds of additive per 100 pounds of resin. As used herein, the term PHM means parts per hundred monomer. For example, 0.04 PHM crosslinking monomer in a core/shell polymer comprising (meth)acrylate monomer units means that the core/shell polymer has 0.04 parts per 100 parts of the (meth)acrylate monomers.
- Table 1 lists the source and composition of the components used in preparing the Inventive and Comparative Examples.
Table 1 Component Composition Source DOWFAX™ 2A1 Alkyldiphenyloxide Disulfonate Anionic Surfactant Dow Chemical Company PARALOID ™ LFR-2006 Impact modified PMMA/acrylate copolymer. Dow Chemical Company PLEXIGLAS™ VS-100 PMMA copolymer Altuglas International division of Arkema LURAN™ 358N SAN Styrene acrylonitrile copolymer BASF Corp. TELURLAN™ GP-22 ABS Acrylonitrile butadiene styrene copolymer. BASF Corp. PARALOID™ EXL-5136 5 micron particle size, crosslinked acrylic copolymer particles. Dow Chemical Company PARALOID™ KF-710 10 to 30 micron particle size, crosslinked styrene/ acrylate copolymer particles. Dow Chemical Company OxyVinyls™ 222 Polyvinyl Chloride Powder (PVC) OxyVinyls LP, Dallas Tx ADVASTAB™ TM-181 Tin stabilizer for PVC Dow Chemical Company ADVALUBE™ B-3314 Lubricant for PVC Dow Chemical Company OMYACARB™ UFT Calcium carbonate filler Omya Inc. TI-PURE™ R-960 Titanium dioxide The du Pont Chemical Co PARALOID™ K-120N Acrylic processing aid for PVC Dow Chemical Company PARALOID™ K-175 Acrylic processing aid for PVC Dow Chemical Company - The second components added to each of Examples 1-4 were prepared according to the following procedure, which is a two shot emulsion polymerization method. The compositions of the second components added to each of Examples 1-4 varied by amount of EGDMA and had an overall composition of 84 PHR MMA / 4 PHR BMA / 12 PHR BA / variable amounts (PHM) of EGDMA.
- 1400 grams deionized water and 0.10 grams sodium hydroxide were charged to a round bottom five liter glass reactor. The contents of the glass reactor were stirred at 100 rpm and heated to 40° C while sparging with dry nitrogen gas for 30 minutes. 10 grams (49.74% solids) of a Dowfax 2A1 surfactant, or 14 grams of a EDTA, disodium salt, and 0.05 grams of iron sulfate heptahydrate were added to the glass reactor. The temperature was maintained at 40 (±2) °C. A monomer emulsion mixture consisting of: (1) 566 grams methyl methacrylate, 27 grams butyl methacrylate, 81 grams of butyl acrylate, and a variable amount of ethylene glycol dimethacrylate ("EGDMA") in 500 grams of water; (2) a solution of 1 gm of sodium persulfate in 20 gms water, and (3) and a solution of 0.11 grams of sodium formaldehyde sulfoxylate in 10 grams of water was then added to the glass reactor. The temperature of the glass reactor was maintained at 40 (±2) °C. The second components used in each of Examples 1, 2, 3, and 4 were produced using 0.14,0.034,0.07, and 0.14 PHM of EDGMA, respectively. The second component used in Comparative Example 1 was produced as above using no EGDMA. The resulting latex in the glass reactor was cooled to 40 °C and 43 grams (49.74% solids). of a DOWFAX 2A1 surfactant was added to the latex. A mixture of: (1) 816 grams methyl methacrylate, 39 grams butyl methacrylate, 116 grams of butyl acrylate, and a variable amount of EGDMA and; (2) a solution of 0.44 grams of tert-butyl hydroperoxide , and a solution of 0.36 grams of sodium formaldehyde sulfoxylate in 10 grams of water were then added to the reactor. Heat was generated with this addition and the peak temperature of the latex mixture was held for about 10 minutes. During the peak temperature hold period, a solution containing 5.5 grams of Dowfax 2A1 and 15 grams of a 5% sodium persulfate was added. Following such addition, the temperature of the mixture was held at the peak temperature for 15 minutes, and then cooled to 40 °C. The latex mixture was then discharged from the glass reactor through a cheesecloth filter. The second component was isolated by drying in a vacuum oven at 50 °C for 40 hrs or until the moisture content was less than 0.5 wt%. The second components used in Examples 1, 2, 3, and 4 were prepared by adding 0.0025, 0.005, 0.01, and 0.020 PHM of EDGMA, respectively, in this step of the process. The second component samples were extruded in a PVC formulation using a Haake, conical, twin screw extruder. Zone 1 was set at 165 °C; zone 2 set at 175 °C; zone 3 set at 175 °C. The RPMS were set at 40, and a 2 inch die with a die gap of 30 mils was used. The die was set at 175 °C. The PVC formulation is shown in Table 2 and is referred to herein as the PVC masterbatch.
Table 2 Material PHR OXYVINYLS™ 222 100 ADVASTAB™ TM-181 1.2 ADVALUBE™ B-3314 2.7 OMYACARB™ UFT 3 TI-PURE™ R-960 9 PARALOID™ K-120N 1 PARALOID™ K-175 0.5 Total 117.4 - This masterbatch formulation was blended in a high speed mixer and the second components were post added to the master batch at 5 PHR based on PVC resin (i.e., OxyVinyls™ 222)(50 grams of second component and 1174 grams of PVC master batch). Table 3 provides the results of gloss testing according to ASTM D523 of each of Examples (Ex.) 1-4 and Comparative Example (Comp. Ex.) 1.
Table 3 Example PHM EGDMA in the second component Gloss, 60° angle Comp. Ex. 1 - 70.4 Ex. 1 * 0.0025 42.0 Ex. 2 * 0.005 30.1 Ex. 3 * 0.01 31.5 Ex. 4 * 0.02 60.5 * (not according to the invention) - As can be seen in Table 3, the surface gloss of the inventive thermoplastic blends goes through a minimum as the amount of EGDMA cross linker is increased. Thus, an optimal level of EGDMA is between 0.005 and 0.01 PHM EGDMA for this thermoplastic blend composition and process. Higher levels of EGDMA nevertheless showed lower gloss than Comparative Example 1 with no second component.
- Gloss testing on Examples 5-10 and Comparative Example 2 were conducted by blending the second components, as discussed below, to an impact modified acrylic resin, PARALOID™ LFR-2006, which is an impact modified PMMA/acrylate copolymer.
* (not according to the invention) - 10 PHR of each second component was mixed with 100 parts of PARALOID™ LFR-2006 powder by bag mixing. The resulting blend was then extruded using a Haake, conical, twin screw extruder with the following conditions: zone 1 was at 165 °C; zone 2 was at 185 °C; zone 3 was at 185 °C; the screw operated at 100 rpm; using a 2 inch die with a gap of 35 mils; and a die temperature of 185 °C. The composition of the second component was 70 wt % MMA/30 wt % EA / variable parts (PHM) EGDMA, as specified below. The second components used in Examples 5-9 and Comparative Example 2 were prepared according to the general procedure described in Comparative Example 1, except that the levels of crosslinkers were varied as listed in Table 4.
- Table 4 provides the gloss and other properties of Examples 5-9 and Comparative Examples 2-3.
Table 4 Example PHM EGDMA Gloss, 75 degree angle Solution Viscosity 5% in DPM Solution %Transmittance 600 nm / 1cm cell Dart Impact In-lb/40 mil Comp. Ex. 3 0 118 - - 39 Comp. Ex. 2 0 78 5040 100 52 Ex. 5 * 0.012 29 600 29.3 45 Ex. 6 * 0.05 95 36 3.9 39 Ex. 7 * 0.1 102 28 6.9 40 Ex. 8 * 0.2 107 12 1.4 42 Ex. 9 * 0.4 110 12 0.7 42 - As can be seen in Table 4, at levels above 0.05 PHM EGDMA gloss increased almost to the level of Comparative Example 3 which contained no second component. Solution viscosity decreased as the crosslinker level, i.e. EGDMA level, is increased as the polymer becomes less soluble and therefore, does not expand as much in the solvent. The opaqueness of the solution also increased as the crosslinker level increases, once again demonstrating that the polymer is becoming less soluble as crosslinker level is increased. The impact resistance was not compromised by the second component, as evidenced by the impact testing results shown in Table 4.
- A second component (70 wt % MMA / 30 wt % EA / 0.01 PHM EGDMA), as described below, was added at 5 PHR and 10 PHR based on the resin Parloid™LFR-2006 to form Examples 10 and 11, respectively. The second component of Examples 10 and 11 was prepared according to the general procedure outlined in Example 1. The composition of the polymer thus prepared is 70 wt% MMA / 30 wt% EA / 0.01 PHM EGDMA. The data shown in Table 5 below illustrates that the gloss reduction is proportional to the level of second component in the formulation and that the level of second component does not negatively affect impact resistance.
* (not according to the invention)Table 5 Example PHR of 2nd component Gloss, 75 degree angle Dart impact in-lb/40 mils Comparative Example 3 0 120 42 Example 10 * 5 57 46 Example 11 * 10 30 48 * (not according to the invention) - PARALOID™ EXL-5136 which is a 5 micron highly crosslinked particle and PARALOID™ KF-710 which is a 10 to 30 micron highly crosslinked particle were used to prepare Comparative Examples 4 and 5, respectively. Comparative Example 1 is the base PVC formulation shown in Table 2 with no gloss reducing additive. The gloss reducing additive used in Example 12 was made according to the following procedure:
* (not according to the invention) - 1400 grams deionized water and 0.10 grams sodium hydroxide were charged to a round bottom five liter glass reactor. The mixture was stirred at 100 rpm and heated to 40° C while sparging with nitrogen for 30 minutes. 10 grams (49.74% solids) of a Dowfax 2A1 surfactant and 0.14 grams of a EDTA, disodium salt and 0.05 grams of iron sulfate heptahydrate were added to the reactor. The temperature was brought to 40 (±2) °C. A mixture of (1) 472 grams methyl methacrylate and 202 grams ethylacrylate, and 0.1 gram of ethylene glycol dimethacrylate (2) a solution of 1 gm of sodium persulfate in 20 grams water, (3) and a solution of 0.11 grams of sodium formaldehyde sulfoxylate in 10 grams of water were added to the reactor. After an exotherm was observed, it was allowed to reach peak temperature, following which the reactor was held at the peak temperature for about 10 minutes and then cooled to 40 °C. Subsequently, 43 grams (49.74% solids) of a Dowfax 2A1 surfactant and a mixture of (1) 680 grams methyl methacrylate and 291 grams ethylacrylate 0.145 grams of ethylene glycol dimethacrylate, (2) a solution of 0.44 grams of tert-butyl hydroperoxide, and a 0.36 grams of sodium formaldehyde sulfoxylate in 10 grams of water were then added to the reactor. An exotherm was observed and allowed to reach peak temperature and held at the peak temperature for about 10 minutes. During the hold period, 5.5 grams of Dowfax 2A1 and 15 grams of a 5% sodium persulfate solution were added to the reactor. Subsequently the resulting latex was then cooled to 40°C. The reactor contents were then discharged through cheesecloth. The second component was isolated by drying in a vacuum oven at 50°C for 40 hrs or until the moisture content was less than 0.5%. The second component prepared as described hereinabove was added solely to Example 12 and not to any of Comparative Examples 1, 4, and 5.
- Table 6 illustrates both gloss reduction and impact resistance effects of Example 12 and Comparative Examples 5-7 in PVC as the matrix polymer. PVC was extruded in the same way as Examples 1-4.
Table 6 Example PHR Second Component Gloss, 20 degree angle Gloss, 60 degree angle Gloss, 85 degree Angle Dart Impact In-lb/40 mils Comp.Ex.1 0 21 72 82 140 Ex. 12 * 5 2.7 19 63 160 Comp. Ex. 5 5 2.1 12 15 60 Brittle Failure Comp. Ex. 4 5 5.4 33 44 124 Brittle Failure - Table 6 illustrates that while gloss can be lowered using large, highly crosslinked polymeric particles, the use of such materials reduced the dart impact resistance of the thermoplastic blend and resulted in brittle failure. In contrast, the lightly crosslinked second component utilized in Example 12 both lowered gloss and maintained impact resistance.
- These examples utilize crosslinking monomers other than EGDMA but at a concentration which provides an equal number of moles of double bonds as provided by 0.012 PHM EGDMA (i.e., molar equivalents). Each of Examples 13-18 were formed as 10 PHR of second component per 100 parts of PARALOID™ LFR-2006. All of Examples 13-18 have a composition of 70 wt % MMA / 30 wt % EA / variable amounts of crosslinking monomer (as specified in Table 7) and were made according to the general procedure described in Example 1. Comparative Example 3 is the PARALOID™ LFR-2006 with no second component.
Table 7 Example Gloss, 75 degree angle Solution Viscosity (cps) % Transparency 600 nm Comparative Example 3 109 - - Example 13 * 31 600 45.3 (0.012 EGDMA) Example 14 * 36 1200 64 (0.014 BGDMA) Example 15 * 42 520 37 (0.008 DVB) Example 16 * 60 6680 96 (0.0076 ALMA) Example 17 * 39 440 24 (0.014 TMPTA) Example 18 * 32 520 23 (0.012 BGDA) * (not according to the invention) - BGDMA = butylene glycol dimethacrylate, DVB = divinyl benzene, ALMA = Allyl methacrylate, TMPTA = trimethylolpropane triacrylate, BGDA = butylenes glycol diacrylate.
- As can be seen from the information in Table 7, a wide variety of crosslinkers may be used in forming the second components used in Examples 13-18 while still achieving gloss reduction.
- The effect of extruder RPM (revolutions per minute) on gloss was examined. Example 19 was prepared as described above in connection with Example 12 except that the final formulation of the second component used in Example 19 has a final composition ratio of 70 wt % MMA/30 wt % EA/0.012 PHM EGDMA. Example 19 was prepared by mixing 10 PHR of the second component with 100 parts PARALOID™ LFR-2006. Extrusion was conducted using the same procedure as for Examples 2 - 9 with the exception that the RPMs of the extruder were varied from 20 to 100 to examine the effect of extruder speed on gloss reduction. Comparative Example 3 is PARALOID™ LFR-2006 with no second component The results are shown in Table 8.
* (not according to the invention)Table 8 Extruder RPM Output rate Puller Setting Gloss, 75 degree angle Example 19 Gloss, 75 degree angle Comparative Example 3 20 12 32.4 108.5 50 20 31.2 105.7 100 39 28.4 105.5 - Table 8 illustrates that the extruder RPMs do not appear to have any appreciable impact on the gloss reduction achieved with the inventive thermoplastic composition. Because the gloss is not dependent on extruder RPMs (shear and throughput rate), the gloss reduction is not likely to be caused by conventional melt fracture. In a melt fracture mechanism for gloss reduction, increasing extrusion rate increases the amount of melt fracture and gloss should decrease with increasing shear rate.
- The effect of extruder melt temperature on gloss was examined. Example 20 was prepared as described above in connection with Example 1 except that the final formulation of the second component used in Example 20 has a final composition ratio of 70 wt % MMA/30 wt % EA/0.014 PHM BGDMA. Example 20 was prepared by mixing PARALOID™ Low-2006, with a ratio of 10 PHR second component. Example 20 and Comparative Example 3 were extruded the same as were Examples 2-9 except that the zones were adjusted to give the melt temperatures shown in Table 9.
* (not according to the invention)Table 9 Melt Temperature, °C Gloss, 75 Degree angle Example 20 Gloss, 75 Degree angle Comparative Example 3 185 37.5 102.1 199 32.7 - 219 29.9 - 229 31.5 114 - In a melt fracture mechanism of gloss reduction, gloss would be expected to increase with increasing temperature as melt fracture is reduced with increasing temperature. In contrast to a melt fracture gloss reduction mechanism, increasing melt temperature shows essentially no effect on the gloss reduction achieved with Example 20.
- The use of lightly crosslinked gloss reducing additives was examined in a variety of matrix polymers. Table 10 lists the compositions of Examples 21-23. Comparative Examples 6-8 are matrix polymers with no second component added. The second component used in each of Examples 21-23 was prepared using the process described in Example 1, except that the final composition ratio of 70 wt % MMA/30 wt % EA/0.01 PHM EGDMA. The second component was added at 10 PHR in each case to the different matrix polymers and extruded using the same procedure as for Examples 5 - 9.
Table 10 Example First component Composition/Source of First Component Second Component (PHR) Comparative Example 6 Plexiglas ®VS-100 PMMA Copolymer from Arkema 0 Example 21 * Plexiglas ® VS-100 10 Comparative Example 7 Luran ® 358N Styrene acrylonitrile copolymer from BASF 0 Example 22 * Luran ® 358N SAN 10 Comparative Example 8 Telurlan ® GP-22 ABS Acrylonitrile butadiene styrene copolymer from BASF 0 Example 23 * Telurlan ® GP-22 ABS 10 * (not according to the invention) Table 11 Example Gloss, 20 degree angle Gloss, 60 degree angle gloss, 75 degree angle Dart Impact in-lb/40 mils Comparative Example 6 67 132 140 Too brittle to test Example 21 * 11 48 88 " " Comparative Example 7 58 136 13.2 " " Example 22 * 0.8 6.6 28.1 " " Comparative Example 8 51.5 95.4 100.8 60.5 Example 23 * 1 6.6 27.2 58.2 * (not according to the invention) - Table 11 includes the gloss and impact resistance for each of Examples 21-23 and Comparative Examples 6-8. As can be seen, the lightly crosslinked second components used in the inventive thermoplastic composition using a variety of matrix polymers is effective at significantly reducing the gloss over that of the matrix polymer without the second component. Moreover, in at least Telurlan GP-22 matrix polymer, there is no negative affect on impact resistance. As shown in previous inventive examples, the inventive thermoplastic compositions based on PVC and impact modified PMMA copolymers also exhibit reduction in gloss and good impact resistance.
- The effect of heating a test specimen, mimicking the effect of thermal forming, was tested by measuring the gloss of an extruded sheet before and following heating at 165 °C for 20 minutes in an oven. Extruded sheets were prepared using Example 12 (described above); Comparative Example 9 containing LFR-2006 and 10 PHR of PARALOID™ EXL-5136; Comparative Example 5 as previously stated, containing LFR-2006 and 5 PHR of PARALOID™ KF-710; and Comparative Example 3 containing solely PARALOID™ LFR-2006. The results of this testing is shown in Table 12. In comparison to each of Comparative Examples 9 and 5, Example 12 showed no increase in gloss following heating, and, in fact, exhibited a slight decrease in gloss following heating.
Table 12 Example Initial Gloss, 75 degree angle Gloss, 75 degree angle, after heating Change in Gloss Comparative Example 3 112 108 - 4 Example 12 * 30 26 - 4 Comparative Example 9 56 91 + 35 Comparative Example 5 64 88 + 24 * (not according to the invention) - The second component used in each of Comparative Examples 10-16 was made according to the following procedure:
- A seed latex was first prepared by adding 500 grams deionized water and 0.04 grams sodium hydroxide to a round bottom five liter glass reactor. The reactor was stirred at 100 rpm and heated to 40° C with sparging with dry nitrogen for 30 minutes. 4 grams (49.74% solids) of Dowfax 2A1, 0.05 grams sodium EDTA, and 0.03 grams iron sulfate heptahydrate were added to the reactor. The temperature was held at 40(±2) °C. A mixture of: (1) 117 grams methyl methacrylate, 117 grams isobutyl methacrylate acrylate and 12.3 grams of ethylene glycol dimethacrylate, (2) a solution of 0.4 grams of sodium persulfate in 20 grams water, (3) and a solution of 0.04 grams of sodium formaldehyde sulfoxylate in 10 grams of water was added to the reactor. After a peak temperature was observed, the peak temperature was held for about 10 minutes. The observed particle size of this latex was 186 nm.
- Comparative Example 10 was prepared by the following procedure: 1100 grams deionized water and 138 grams of the seed (preparation described above, at 36% solids) were charged to a round bottom five liter glass reactor. The reactor was stirred at 100 rpm and heated to 40 °C with sparging with dry nitrogen for 30 minutes. 4 grams (49.74% solids) of a Dowfax 2A1 surfactant were added to the reactor. The temperature was adjusted to between 79-81°C. A mixture of: (1) 384 grams methyl methacrylate, 165 grams ethylacrylate and 1.38 grams of ethylene glycol dimethacrylate, (2) a solution of 2 grams of sodium persulfate in 60 grams water was added to the reactor over a period of 4 hours. The temperature was then held at 80°C for another 120 minutes after which the mixture was discharged from the reactor through a 150 mesh filter.
- Comparative Examples 11 and 12 were made by using 45 and 125 grams of the latex seed described above, respectively. For each of Comparative Examples 10-12, the second component was added at a level of 10 PHR based on LFR-2006, except for Comparative Example 3 which is solely LFR-2006. Example 13 was prepared as previously described. The second component of Comparative Examples 20-23 (LTL4671/4672/4673/ MLK8528) was prepared by the following procedure:
- 450 grams deionized water and 136 grams of the latex of Example 13 as a seed latex were charged to a round bottom five liter glass reactor. The reactor was stirred at 100 rpm and heated to 40° (±2)C with sparging with dry nitrogen for 30 minutes. 3 grams (49.74% solids) of a Dowfax 2A1 surfactant, 0.05 grams sodium EDTA, and 0.03 grams iron sulfate heptahydrate were added to the reactor. The temperature was adjusted to 40(±2) °C. A mixture of: (1)172 grams methyl methacrylate, 74 grams ethylacrylate and 0.03 grams of ethylene glycol dimethacrylate, (2) a solution of 0.4 gm of sodium persulfate in 60 gms water and 0.04 gms of sodium formaldehyde sulfoxylate in 10 gms water was added to the reactor. After a peak temperature is observed, the reactor was held at peak temperature for 10 minutes and then cooled to 40°C before collecting the sample. Thus comparative Examples 13-16 were prepared by using 136, 25, 15, and 3 grams respectively of the seed latex, preparation described in Example 13, the preparation of which is described above.
Table 13 Particle Size Nm Gloss,75 degree angle 5% Solution Viscosity (cps) % Transmittance 600 nm Dart Impact inch-lb/40 mils Comparative Example 3 119 - - 41 Comparative Example 10 356 110 42 8.6 37 Comparative Example 11 505 112 30 1.3 38 Comparative Example 12 855 75 50 31 30 Example 13 * 184 31 600 45.3 49 Comparative Example 13 350 82 82 1.2 41 Comparative Example 14 400 90 78 1.2 39 Comparative Example 15 500 82 50 1.2 28 Comparative Example 16 794 94 32 15 33 * (not according to the invention) - For Comparative Examples 10-12, as the particle size increases, the gloss starts to drop, but not as efficiently as in the inventive thermoplastic composition like. Example 13. These examples contain 0.25 PHM of EGDMA and are moderately crosslinked. Comparative Examples 13-16 are made according to the method that the inventive thermoplastic compositions are made, except they are made with a larger particle size. Despite the larger particle size, Comparative Examples 13-16 do not show a drop in gloss as would be expected from a gloss reduction mechanism depending upon large particles sticking out of the surface.
Table 14 Particle Size, Nm Ra Micron Rz micron Rmax Micron Gloss,75/60 Degree angle Comparative Example 3 - 0.107 1.7 2.6 119/115 Example 13 * 184 0.806 8.1 10.1 31/7.5 70 wt % MMA/30 wt %EA/0.012 PHM EGDMA Example 15 * 200 0.752 7.3 9.0 42/10.7 70 wt %MMA/30 wt % EA/0.008 PHM DVB Example 16 * 183 0.664 6.4 7.8 60/18.2 70 wt % MMA / 30 wt% EA/ 0.0076 PHM ALMA Comparative Example 12 855 0.299 3.1 3.6 75/34 69.75 wt%MMA/30wt% EA/0.25PHM EGDMA * (not according to the invention) - Each of the examples in Table 14 includes the second component at a level of 10 PHR per PARALOID™ LFR-2006 and extruded using the same procedure as for Inventive Examples 5-9.
- The samples were made according to the procedure outlined in Example 13. The MMA/EA ratio was varied from 86 : 14 to 60 : 40. Examples 24-27 each contained 5 PHR the second component per 100 parts of the PVC in the masterbatch of Table 2. To show the effect of polymer Tg on gloss reduction, additives were added to the PVC master batch formulation and extruded as described in Comparative Ex 1. Examples 24-27 each contained 5 PHR the second component per 100 parts of PVC in the master batch. As shown in Table 15, as Tg was lowered, gloss decreased and leveled off at a calculated Tg around 60 °C. Tg was calculated using the Gordon-Tayler equation, as detailed in Penzel, E, Rieger, J, and Schneider, H.A., " The Glass Transition Temperature of Random Copolymers: 1. Experimental Data and the Gordon Taylor Equation", Polymer, Vol. 38, No.2, 1997, pp. 325-337. Specifically: Tg = (TgAwA +KTgBwB) ÷ (wA+ KwB), where wA and wB are the weight fractions and TgA and TgB the glass transition temperatures of the respective homopolymers. TgA and TgB are assigned such that TgA < TgB. K is a constant that depends on composition and the values are listed in the reference.
* (not according to the invention)Table 15 Tg Gloss, 60 degree Comparative Example 1: No Additive 72 Example 24: 86 wt % MMA/14 wt % EA/0.015 PRIM EGDMA * 80.5 60 Example 25: 80 wt % MMA/20 wt % EA/0.015 PHM EGDMA * 74.3 34 Example 26: 70 wt % MMA/30 wt % EA/0.015 PHM EGDMA * 60.9 19 Example 27: 60 wt % MMA/40 wt % EA/0.015 PHM EGDMA * 48.6 17 - For isolation of powders from emulsions by methods such as spray drying, it is advantageous to have a high Tg (greater than 60 °C) shell on particles so that the powder does not pack into a solid during storage. This is particularly a problem with polymers that have a Tg of less than 60 °C. In Examples 29-35, a core polymer is first made and a shell of PMMA is placed on the core. example 28 is just the core with no shell. The shell can be made with or without crosslinking monomer. In the following examples, the shell has a Tg of 105 °C. The core polymers were prepared by the general procedure outlined for Example 13 except that different MMA to EA ratios were used to obtain the target Tg. A shell layer of either crosslinked or uncrosslinked MMA is added by the following procedure:
- 1300 grams of the latex prepared using the process described in connection with Example 1, containing 520 grams of polymer, with a composition of 80 PHR MMA/20PHR EA/0.012 PHM EGDMA, and 3 grams of Dowfax 2A1 were mixed in a glass reactor. The contents of the glass reactor were stirred at 100 rpm and heated to between 74-76° C while sparging with dry nitrogen gas for 30 minutes. A mixture of: (1) 0.14 grams of sodium persulfate in 30 grams of water and (2) 90 grams MMA and 0.01 grams EGDMA, were fed to the reactor over a period of 60 minutes while the temperature was maintained between 74 and 76 °C. After the feeds were complete, the reaction mixture was held at 75 °C for another 30 minutes, cooled to 40 °C, filtered and freeze dried. The samples described in the Table 16 were prepared with the same procedure with no EGDMA crosslinker in Inventive Example 33-35. The second component was added at a rate of 10 PHR per 100 parts of PARALOID™ LFR-2006 and extruded as in Examples 5-9.
- Polymer Particle Size: Polymer particle size was measured using very dilute aqueous dispersions, i.e., latexes (diluted to 0.001% solids) with a BI 90 (Brookhaven Instruments, Holtsville, NY) particle size detector, utilizing Dynamic Light Scattering (15° and 90° scattering angles) and a laser light source. The signal was detected by a photodiode array and the data analyzed with a built in correlator.
- Gloss: Gloss was measured according to ASTM D523. Specifically, gloss was measured on test samples using a Byk-Gardner hand held micro-gloss meter. Gloss was measured using 20, 60, 75, and 85 degree gloss meter geometries. For samples that were unpigmented, a black background was placed under the test sample before measuring gloss. Measurements were the average of three readings.
- Solution Viscosity: Polymer samples were dissolved in di(propylene glycol) methyl ether (97% purity from Aldrich Chemical) as a 5% solution by shaking overnight. 4 oz. straight walled bottles were used containing 90 grams of total solution. The dissolved polymer was placed in a 25 °C water bath for 20 minutes and then the viscosity was measured using a Brookfield RVT viscometer. Spindle 5 was used at 100 rpms.
- Percent Transmittance: The 5% solutions prepared for solution viscosity measurements were placed in 1 cm path length cells for a visible spectrophotometer. The percent transmittance was read against a blank of the pure solvent.
- Impact: Impact was measured according to ASTM 4226, i.e., dart impact, on 2 inch wide extruded strips of polymer that were about 40 mils in thickness. A Gardener drop dart tester was used with a 2 lb weight. The dart had a 0.5 inch diameter, round tip. The height in inches needed to cause any breakage of the strip was recorded. The thickness of the strip was measured with a micrometer. Impact = (height in inches x 2 lb x 40) ÷ (strip thickness) = in-lb/40 mils. Surface Roughness: Samples strips for testing were made by extrusion as describe in the relevant example. Roughly 3 by 5 cm sections were cut and adhered to 5 cm by 9 cm aluminum plates with double-sided tape. Additional tape was applied around the sides of the sections to keep them as flat as possible. The samples were sputtercoated with Au/Pd to increase reflectivity. A Wyko NT 1000 Optical Profilometer was used to examine the surface roughness with the experimental conditions listed in Table 17. A magnification of 10x was used, covering an area of roughly 0.25 mm2 per scan. Five locations for each section were examined. The instrument's software calculates the following roughness measurements according to DIN4768: Ra (average height); Rz (ave. of 10 highest - ave. of 10 lowest); and Rmax(max height - min height).
Table 17 Optical Profilometry Instrument Wyko NT 1000 Mode VSI Magnification 2.5x, 10x Speed 3x Backscan 30-100µm Scan length 300-360µm Sputtercoating Au/Pd 80 sec. w/ Ladd Hummer 6.6 - Opacity: Opacity was determined by visual inspection of the solution with a rating scale from 1 to 10. A rating of 1 indicates a perfectly clear solution and a rating of 10 indicates an opaque solution.
- DSC: The glass transition is measured in a TA Instruments Q1000 Differential Scanning Calorimeter using a small sample of the polymer (5-20 mg) sealed in a small aluminum pan. The pan is placed in the DSC apparatus, and its heat flow response is recorded by scanning at a rate of 10° C/min from room temperature up to 180° C. The glass transition temperature is observed as a distinct shift in the heat flow curve.
Gloss, 75° angle | Core Tg, °C | 5% Solution Viscosity, cps | % Transmittance 600 nm | |
Comparative Example 3 | 120 | - | - | |
PARALOID™ LFR-2006 with no additive | ||||
Example 28 * | 33 | 600 | 45.3 | |
70 wt % MMA/30 wt % EA/ 0.012 EGDMA | ||||
Inventive Example 29 | 29 | 74.3 | 112 | 21 |
Core 85% (80 wt % MMA/20 wt % EA/0.012 PHM EGDMA) Shell 15% (100 wt % MMA/0.012 PHM EGDMA) | ||||
Inventive Example 30 | 25 | 61.7 | 158 | 22.4 |
Core 85% (70.6 wt % MMA/29.4 wt% EA/0.012 PHM EGDMA) Shell 15% (100 wt % MMA/0.012 PHM EGDMA) | ||||
Inventive Example 31 | 26 | 48.6 | 216 | 39.5 |
Core 85% (60 wt % MMA/40 wt % EA/0.012 PHM EGDMA) Shell 15% (100 wt % MMA/0.012 PHM EGDMA) | ||||
Inventive Example 32 | 23 | 36.7 | 272 | 51.8 |
Core 85% (49.4 wt % MMA/50.6 wt % EA/0.012 PHM EGDMA) Shell 15% (100 wt % MMA/0.012 PHM EGDMA) | ||||
Inventive Example 33 | 31 | 48.6 | - | - |
Core 85% (60 wt % MMA/40 wt% EA/0.012 PHM EGDMA) Shell 15% (100 wt %MMA with no crosslinker) | ||||
Inventive Example 34 | 29 | 36.7 | - | - |
Core 85% (49.4 wt % MMA/50.6 wt % EA/0.012 PHM EGDMA) Shell 15% (100 wt % MMA with no crosslinker) | ||||
Inventive Example 35 | 39 | 12.4 | ||
85% (24.7 wt % MMA/75.3 wt % EA/0.012 PHM EGDMA) Shell 15% (100 wt % MMA with no crosslinker) |
* (not according to the invention) |
Claims (10)
- A thermoplastic composition comprising the melt blending product of:a first component comprising one or more thermoplastic polymers; anda second component comprising one or more core/shell polymers
wherein said one or more core/shell polymers comprise
a crosslinked core comprising a (meth)acrylate copolymer having a glass transition temperature of greater than or equal to 10°C and from 0.001 and 0.04 parts by weight per hundred parts by weight of the total weight of the one or more (meth)acrylate monomers derived from one or more crosslinking monomers and/or graft-linking agents, and
one or more, optionally crosslinked, thermoplastic shells having a Tg of equal to or greater than 60°C wherein the total amount of the one or more shells comprises 5 to 50 wt % of the total weight of the one or more core/shell polymers, and wherein the glass transition temperature is measured using differential scanning calorimetry at a rate of 10°C/min from room temperature up to 180°C. - The thermoplastic composition according to Claim 1, wherein the one or more core/shells further comprise from 0.001 to 0.04 parts by weight per hundred parts by weight of the total weight of the one or more (meth)acrylate monomers derived from one or more crosslinking monomers and/or graft-linking agents having two or more ethylenically unsaturated radicals capable of free-radical polymerization.
- The thermoplastic composition according to Claim 1, wherein the second component has a polymer particle average volume size between 70 and 250 nm.
- The thermoplastic composition according to Claim 1, wherein the one or more (meth)acrylate copolymers of the one or more gloss reducing additives comprise from 50 to 95 percent by weight units derived from methylmethacrylate units and from 5 to 50 percent by weight derived from ethylacrylate and/or butylacrylate units.
- The thermoplastic composition according to Claim 1, wherein the one or more (meth)acrylate copolymers of the second component comprise from 65 to 85 wt % derived from methylmethacrylate units and from 35 to 15 wt % derived from ethylacrylate units and further wherein the gloss reducing additive comprises from 0.002 to 0.015 parts by weight per hundred parts by weight of the total weight of the one or more (meth)acrylate monomers derived from EDGMA units.
- The thermoplastic composition according to Claim 1, wherein the thermoplastic composition has an impact strength that is at least 90 % of the impact strength of the first component, and wherein the impact strength is measured according to ASTM D4226.
- A method for forming an article comprising the steps of:selecting a thermoplastic composition according to Claim 1; andforming the thermoplastic composition into an article.
- The method of Claim 7, wherein the step of forming the thermoplastic composition into the article is selected from injection molding, rotational molding, thermoforming, calendering, extrusion, compression molding, and blow molding.
- An article formed from the method according to Claim 8.
- The article according to Claim 9, wherein the article has a gloss which is substantially independent of the shear rate during the step of forming the thermoplastic composition into the article.
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US10450491B2 (en) | 2016-08-08 | 2019-10-22 | Ticona Llc | Thermally conductive polymer composition for a heat sink |
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US3415796A (en) | 1966-03-24 | 1968-12-10 | Rohm & Haas | Extruded matte finish acrylic film |
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